Answer:
The second ball has four times as much kinetic energy as the first ball.
Explanation:
Kinetic Energy
Is the type of energy an object has due to its state of motion. It's proportional to the square of the speed.
The equation for the kinetic energy is:
[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
Two tennis balls have the same mass m and are served at speeds v1=30 m/s and v2=60 m/s.
The kinetic energy of the first ball is:
[tex]\displaystyle K_1=\frac{1}{2}m\cdot 30^2[/tex]
[tex]\displaystyle K_1=\frac{1}{2}m\cdot 900[/tex]
[tex]K_1=450m[/tex]
The kinetic energy of the second ball is:
[tex]\displaystyle K_2=\frac{1}{2}m\cdot 60^2[/tex]
[tex]\displaystyle K_2=\frac{1}{2}m\cdot 3600[/tex]
[tex]K_2=1800m[/tex]
Being m the same for both balls, the second ball has more kinetic energy than the first ball.
To find out how much, we find the ratio:
[tex]\displaystyle \frac{K_2}{K_1}=\frac{1800m}{450m}[/tex]
Simplifying:
[tex]\displaystyle \frac{K_2}{K_1}=4[/tex]
The second ball has four times as much kinetic energy as the first ball.
Answer:
he second ball has four X as much kinetic energy as the first ball
Explain:
Kinetic Energy Is the type of energy an object has due to its state of motion. It's proportional to the square of the speed
m/the mass of the object
v/the speed at which the object moves
The kinetic energy is expressed in Joules (J)
Two tennis balls have the same mass m and are served at speeds v1=30 m/s and v2=60 m/s.
Being m the same for both balls, the second ball has more kinetic energy than the first ball. So there for The second ball has four times as much kinetic energy as the first ball.
Select all that are correct.
3. According to Newtons 1st law, which of the following would be true?
f. An object at rest will stay at rest.
g. An object in motion will stay in motion.
h. An object in motion or at rest will have a net force of zero.
i. Acceleration will be zero for object showing Newton’s 1st law.
j. Acceleration goes in the opposite direction of the net force.
4. Inertia is
a. A body's resistance to motion change.
B. The same as weight
C. The same as mass.
D. Is associated with the first law of motion
5. Newton's 2nd law must use (F= ma)
a. The friction force
b. The net force
C. The applied force
d. The normal force.
Answer:
f and g are correct
Explanation:
Answer:
3) F
4) A
5) D
Explanation:
huhu basta yan lang alamko!
different between density and realative density
Answer:
Density is mass of the object per unit volume. Relative density is the density of a body with respect to another. Simply, density=mass/volume.
Please help me on due today
A personal enrichment goal is related to your life outside the classroom. You might set a goal to read every day or take on a new challenge in an extracurricular team, sport, or activity.
Your completed portfolio will demonstrate how you worked to achieve your stated goals.
• Step 1: Decide what you want to achieve.
• Step 2: Set your goal.
• Step 3: Decide what actions you need to take to reach your goal.
• Step 4: Set a time frame.
• Step 5: Think about your assets and obstacles.
Subject-Matter Achievement Goal
1. My subject-matter achievement goal is:
Answer:
2. My action steps are:
Answer:
3. My time frame is:
Answer:
4. Assets and Strengths:
Answer:
5. Motivation:
Answer:
6. Obstacles:
Answer:
7. Solutions:
Answer:
Study/Organizational Skills Goal
8. My study/organizational skills goal is:
Answer:
9. My action steps are:
Answer:
10. My time frame is:
Answer:
11. Assets and Strengths:
Answer:
12. Motivation:
Answer:
13. Obstacles:
Answer:
14. Solutions:
Answer:
Personal Enrichment Goal
15. My personal enrichment goal is:
Answer:
16. My action steps are:
Answer:
17. My time frame is:
Answer:
18. Assets and Strengths:
Answer:
19. Motivation:
Answer:
20. Obstacles:
Answer:
21. Solutions:
Answer:
Subject-Matter Achievement Goal
1. My subject-matter achievement goal is:
Answer: Read 1 full chapter book in 1 week
2. My action steps are:
Answer: Read an equal amount of chapters every day for a week
3. My time frame is:
Answer: 1 week
4. Assets and Strengths:
Answer: ability to focus,
5. Motivation:
Answer: Great interest in the book I chose
6. Obstacles:
Answer: Might lose page number, forget where I am at in the book, forget to read one day
7. Solutions:
Answer: Get or make a bookmark, keep a personal reading log, set alarm for a certain time each day
Study/Organizational Skills Goal
8. My study/organizational skills goal is:
Answer: manage my time better
9. My action steps are:
Answer: planning things out to be more organized
10. My time frame is:
Answer: from now to the end of the school year
11. Assets and Strengths:
Answer: a planner so I can pace myself
12. Motivation:
Answer: give breaks and take time to do things I enjoy
13. Obstacles:
Answer: leaving things last minute
14. Solutions:
Answer: planning to do certain things before a certain day
This can be for any of those goals
Personal Enrichment Goal
15. My personal enrichment goal is:
Answer: Stay healthy
16. My action steps are:
Answer: eat healthier foods
17. My time frame is:
Answer: now to the end of the school year
18. Assets and Strengths:
Answer: I don't make a big deal out of eating veggies and stuff
19. Motivation:
Answer: treat myself every so often
20. Obstacles:
Answer: Craving junk food
21. Solutions:
Answer: find a way to make healthier foods taste similar to junk food (EX. Put cheese on broccoli)
The mantle is very hot and is both semi-liquid and semi-solid
Answer:
incorrect, the mantle is solid
Explanation:
The power in an electrical circuit is given by the equation P= RR, where /is
the current flowing through the circuit and Ris the resistance of the circuit.
What is the power in a circuit that has a current of 0.02 amps and a
resistance of 30 ohms?
Equation of power in a electrical circuit is given as:
[tex] \bf P = I^2R[/tex]
I → Current flowing through the circuit.
R → Resistance of the circuit
We need to calculate power when;
Current (I) = 0.02 A
Resistance (R) = 30 Ω
By substituting values in the equation, we get:
[tex] \rm \longrightarrow P = (0.02)^2 \times 30 \\ \\ \rm \longrightarrow P = 0.0004 \times 30 \\ \\ \rm \longrightarrow P = 0.012 \: W[/tex]
[tex] \therefore [/tex] Power in the circuit = 0.012 W
Momentum is a product of mass and _____.
Answer:
Momentum, product of the mass of a particle and its velocity. ... Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.
what is vector quantity
Answer:
The quantity which have both magnitude and direction is called vector quantity
A physical Quantity, which has magnitude, direction and units But must follow the traingle law of vector addition
Example:- Force, velocity acceleration displacement etc.
What type of motion is illustrated in the diagram below?
A. Oscillating motion faster than the speed of sound.
B. Oscillating motion slower than the speed of sound.
C. Circular motion faster than the speed of sound.
D. Circular motion slower than the speed of sound.
Answer:
Explanation:
C
what are factors that may affect the potential energy? (help)
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Explanation:
hope this helps
The factors affecting potential energy of a body are mass, acceleration due to gravity, and height above the ground.
What is potential energy?Potential energy is the energy that a body possess as a resulting its state or position relative to the ground.
Mathematically;
Potential energy = mass × acceleration due to gravity × heightTherefore, the factors affecting potential energy of a body are mass, acceleration due to gravity, and height above the ground.
Learn more about potential energy at: https://brainly.com/question/14427111
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A truck moving due south takes a turn and starts moving towards east while maintaining the same speed.
Its velocity remains constant.
It covers unequal distances in equal intervals of time.
Its velocity changes
None of the above
Answer:
Its velocity changes
Explanation:
When the truck changes direction, its velocity changes.
Velocity is a vector quantity that specifies the magnitude of motion and direction it is taking.
When direction changes, the velocity of a body will also change. This is unlike speed which is a scalar quantity.
Velocity is the displacement divided by time taken.
Question 7 of 20
Which sample of water has the most thermal energy?
A. A 1.5 kg sample at 10°C
O B. A 0.5 kg sample at 1°C
O C. A 1 kg sample at 10°C
O D. A 1 kg sample at 4°C
Answer:
4
Explanation:
because she is thermal energy
Answer: A 1.5 kg sample at 10 degrees c
Explanation:
A PEX
A metal ball has a mass of 2.05 kg and a volume of 6.8 cm. What is its density? Remember
Answer:
the density is 0.301 :)
Can someone help me with these questions please. I will mark brainliest
Answer:
3: I can´t see the text/image, but it depend on the mass and the force applied to the ball, if both are too high, it will be harder to make a home run. (Second law)
4:It would be easier to make a home run because there is no interruption between the ball and the space the same travels. (Third law)
Explanation:
Which of the following games below involves different manipulative skills like throwing and rolling and some motor skills?
Group of answer choices
target games
invasion games
striking and fielding games
physical activity
Answer:
striking and fielding
Explanation:
striking and fielding
When a 3.0 kg mass is hung from a vertical massless spring, the spring is stretched 40 cm. What is the spring constant of the spring?
Answer:
0.74 N/cm
Explanation:
The following data were obtained from the question:
Mass (m) = 3 Kg
Extention (e) = 40 cm
Spring constant (K) =?
Next, we shall determine the force exerted on the spring.
This can be obtained as follow:
Mass (m) = 3 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Force (F) =?
F = mg
F = 3 × 9.8
F = 29.4 N
Finally, we shall determine the spring constant of the spring. This can be obtained as follow:
Extention (e) = 40 cm
Force (F) = 29.4 N
Spring constant (K) =?
F = Ke
29.4 = K × 40
Divide both side by 40
K = 29.4 / 40
K = 0.74 N/cm
Therefore, the spring constant of the spring is 0.74 N/cm
A net force of 1 newton causes an object to accelerate at a rate of 5.0 meters per second per second. What is the mass of the object?
The mass of the object is equal to 0.2 Kg when it accelerates at 5.0 m/s².
What is acceleration?Acceleration of an object can be defined as the rate at which the object changes its velocity w.r.t. time. The acceleration can be expressed as the second derivative of position w.r.t. time and is a vector parameter.
The force exerted on an object is equal to the multiplication of the mass (m) and acceleration (a) according to Newton's 2nd law of motion.
F = ma
And, a = F/m
The mass and acceleration have an inverse relationship.
Given, the net force acting on an object, F = 1 N
The object is accelerating at a rate, a = 5.0 m/s²
The mass of the object can be determined by using the given information as follows:
m = F/a
m = 1/ 5.0
m = 0.2 Kg
Therefore, the mass of the object is equal to 0.2 Kg.
Learn more about acceleration, here:
brainly.com/question/3046924
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A baseball bat is a lever. Which of the following explains how a baseball bat differs from a lever like a pry bar?
Complete question is;
A baseball bat is a lever. Which of the following explains how a baseball bat differs from a lever like a pry bar?
A) In a baseball bat, effort force is smaller and is applied over a large distance, while the resistance force is smaller and is applied over a long distance.
B) In a baseball bat, effort force is smaller and is applied over a large distance, while the resistance force is smaller and is applied over a short distance.
C) In a baseball bat, effort force is larger and is applied over a short distance, while the resistance force is smaller and is applied over a long distance.
D) In a baseball bat, effort force is larger and is applied over a short distance, while the resistance force is smaller and is applied over a short distance.
Answer:
C) In a baseball bat, effort force is larger and is applied over a short distance, while the resistance force is smaller and is applied over a long distance.
Explanation:
The correct answer is option C. This is because unlike in a pry bar, the effort force when swinging a baseball bat is larger and it is applied over a short distance; and in return the resisting force is smaller and it's applied over a long distance.
Assuming the system is in equilibrium, calculate the missing distance d
Answer:
d=3.4m
Explanation:
From principle of equilibrium,
TOTAL C.WISE MOMENTS = TOTAL A.C.WISE
10N×d = 2N ×2m + 6N×5m
10Nd =4Nm+ 30Nm
10Nd=34Nm
10N 10N
d=3.4m
The system is in equilibrium, calculate the missing distance d=3.4 m.
What is Displacement?Displacement is defined as the change in position of an object. It is a vector quantity and has a direction and magnitude.
From principle of equilibrium,
TOTAL C.WISE MOMENTS = TOTAL A.C.WISE
10 N×d = 2 N ×2 m + 6 N×5 m
10 Nd = 4 N m+ 30 N m
10 Nd = 34 N m
d = 3.4 m
The system is in equilibrium, calculate the missing distance d=3.4 m.
To learn more about displacement refer to the link:
brainly.com/question/11934397
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A wave vibrates up and down 22 cycles in 7 seconds with a wave speed of 57. Calculate the
wavelength. (Round to the 2nd number after the decimal)
Answer:
18.14m
Explanation:
Given parameters:
Frequency = [tex]\frac{22}{7}[/tex]cycles/s
Speed of wave = 57m/s
Unknown:
Wavelength = ?
Solution:
The speed of a wave is related to frequency and wavelength using the expression below;
V = f x λ
V is the speed of the wave
f is the frequency
λ is the wavelength
Insert the parameters and find λ;
57 = [tex]\frac{22}{7}[/tex] x λ
λ = 57 x [tex]\frac{7}{22}[/tex] = 18.14m
• Which is the following statements describes the interaction between magnetic poles?
Answer:
Please state the statements in the comment so I can help
A circus performer swings down from a platform on a rope tied to the top of a tent in a pendulum-like swing. The performer's feet tough the ground 9 meters below where the rope is tied. how fast is the performer moving at the bottom of the arc?
First solve for time to fall using: = √2 ∶ 2(9) = 1.35. Then solve for velocity √9.8
2
2
using: = ∶ 9.8 2 ∗ 1.35 =13.23 m/s The performer’s velocity is 13.2 m/s
at the bottom of the swing.
Explanation:
particle moving with constant acceleration changes its velocity from 10 m/s to
20m/s while covering a distance of 130m. Find the acceleration of the particle.
Click on photo to view full solution
Erica (39 kg ) and Danny (46 kg ) are bouncing on a trampoline. Just as Erica reaches the high point of her bounce, Danny is moving upward past her at 4.6 m/s . At that instant he grabs hold of her.
Answer:
V = 2.79 m/s
Explanation:
Momentum before = momentum after
Erica's momentum = 0
Danny momentum = 49 kg * 4.9 m/s = 240.1 kg-m/s
240.1 + 0 = (37 + 49) kg * V
86 V = 240.1
V = 2.79 m/s
Give me some pointers please, I need to finish this ASAP-
Plz help !!!!!! ................................
Answer:
I think the answer is B. Can I have brainlest if I am right, please?
Explanation:
Answer:
it is B because period =1/ frequency and B has lower period
What role does the battery play in this circuit design? A) The battery works as the system's wires.
B) The battery is the electrical power supply.
C) The battery is the circuit's main conductor.
D) The battery works as the system's electrical switch.
Answer:
B
Explanation:
i got it right on the usatestprep
Which of the following is a muscle on the front side of the upper body?
Answer:
What are the following?
Explanation:
Black widow (m=57000 g) shovels snow, holding the shovel at a 40 degree angle above the ground. If she uses a constant force of 180. N and pushes the snow 5.00 m. How much work does she do on the snow?
Answer:
She does a work of 689.44 J in the snow.
Explanation:
A force is said to do work when it alters the state of motion of a body. The work of the force on that body will be equivalent to the energy needed to move it.
In other words, Work is a form of energy transmission between bodies. In order to carry out work, a force must be exerted on a body and it must move.
The work is equal to the product of the force times the distance and the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:
W= F*d* cos Ф
Work W is measured in joules (J), force is measured in newtons (N), and displacement in meters (m).
In this case:
F= 180 Nd=5 mФ= 40 degreesReplacing:
W= 180 N*5 m* cos 40
Solving:
W= 689.44 J
She does a work of 689.44 J in the snow.
What changes when unbalanced forces are
applied to a moving bike along the direction
it is moving?
2
7.42 X 10
What is the scientific notation for this equation
Answer:
7 42 x 10^1
Explanation:
Because 10 x 1 =10
