Answer:
it is friction
Explanation:
A bus travels at a constant speed of 40.0 m/s for .8h. Whats the total distance travelled in km.
Answer:
1,152 km. Hope this helps!
Explanation:
A 24 kg crate initially at rest on a horizontal floor requires a 75 N horizontal force to set it in motion. Once the crate is in motion, a horizontal force of 53 N keeps the crate moving with a constant velocity. Find μk, the coefficient of kinetic friction, between the crate and the floor.
Answer:
The coefficient of kinetic friction is approximately 0.225
Explanation:
The given parameters are;
The mass of the crate = 24 kg
The force required to set the mass in motion = 75 N
The force required to keep the crate in constant velocity = 53 N
We have;
Sum of horizontal forces, ∑Fₓ = 0
∑Fₓ = The force pulling thing the crate - The force of friction - The force of acceleration of the crate
The force of acceleration of the crate = 0 (Crate with constant velocity)
The force of friction = [tex]\mu_k[/tex] × N
N = The normal (acting perpendicular to the surface) force = (Here) Mass of crate × Gravity
[tex]\mu_k[/tex] = The coefficient of kinetic friction
N = 24 × 9.81 = 235.44 N
The force of friction = [tex]\mu_k[/tex] × 235.44
∴ ∑Fₓ = The force pulling thing the crate - The force of friction
∑Fₓ = 53 - [tex]\mu_k[/tex] × 235.44 = 0
53 - [tex]\mu_k[/tex] × 235.44 = 0
53 = [tex]\mu_k[/tex] × 235.44
[tex]\mu_k[/tex] = 53/235.44 ≈ 0.225
[tex]\mu_k[/tex] = The coefficient of kinetic friction ≈ 0.225.
The coefficient of kinetic friction between the crate and the floor is 0.22.
The coefficient of kinetic friction μk shows the ratio between frictional force and normal force over a body on a rough surface.
Given that:
mass of the crate = 24 kgthe horizontal force [tex]\mathbf{F_{s,max}}[/tex] = 75 NWe need to first find the coefficient of static friction (μs) to determine (μk);
Using the formula:
[tex]\mathbf{\mu_s = \dfrac{F_{s, max}}{m\times g}}[/tex]
[tex]\mathbf{\mu_s = \dfrac{75 \ N }{24 \ kg \times 9.81 \ m/s^2}}[/tex]
[tex]\mathbf{\mu_s = \dfrac{75 }{235.44}}[/tex]
[tex]\mathbf{\mu_s =0.32 }[/tex]
Now, once the crate is in motion; the horizontal force = 53 NHowever, the net force = 0; since F = Fk∴
The coefficient of kinetic friction can be computed as;
[tex]\mathbf{F = \mu_k \times N}[/tex]
[tex]\mathbf{ \mu_k = \dfrac{F}{N}}[/tex]
[tex]\mathbf{ \mu_k = \dfrac{f}{m \times g}}[/tex]
[tex]\mathbf{ \mu_k = \dfrac{53}{24 \times 9.8}}[/tex]
[tex]\mathbf{ \mu_k =0.22 }[/tex]
Therefore, we can conclude that the coefficient of the kinetic friction is 0.22
Learn more about the coefficient of kinetic friction here:
https://brainly.com/question/13754413?referrer=searchResults
what is universe made off
Answer:
I mean, correct me if I'm wrong for some reason, but I think its Matter?
Answer:
The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.
Explanation:
What is the force of a lead ball that starts with a momentum of 7 kg*m/s and end with a momentum of 22 kg*m/s over a time of 31 seconds?
Explain how you got your answer.
Answer:
F = 0.483 N
Explanation:
Initial momentum, [tex]P_i= 7\ kg-m/s[/tex]
Final momentum, [tex]P_f= 22\ kg-m/s[/tex]
Time, t = 31 s
We need to find the force of a lead ball. We can use here the impulse momentum theorem.
[tex]\text{Change in momentum}=F\times t[/tex]
F is force
[tex]P_f-P_i=Ft\\\\F=\dfrac{P_f-P_i}{t}\\\\F=\dfrac{22-7}{31}\\\\F=0.483\ N[/tex]
So, the force is 0.483 N.
What stage of mitosis does mutations occur?!
Answer:
if it is a gene mutation then it is during the S phase, and if it is a chromosome mutation, then during metaphase or anaphase.
Explanation: I think it happens in the interphase
When a mutation occurs in mitosis, stage of Mitosis is interphase.
What is mutation?Mutation that occurs in mitosis typically causes tumor.
Genetic mutations occur during the S phase of the cell cycle i.e during interphase before mitosis begins. When DNA is replicated, error would cause a mutation in the genetic code. Chromosomal nondisjunction denotes the failure of replicated chromosomes to separate causing extra or missing chromosomes in the daughter cells to occur. This mutation can occur during mitosis.
Thus, When a mutation occurs in mitosis, stage of Mitosis is interphase.
Learn more about mutation.
https://brainly.com/question/13923224
#SPJ2
Explain why the nucleus is very dense BRAINLIEST
A hockey stick strikes a hockey puck of mass 0.17 kg. If the force exterted on the hockey puck is 35.0 N and there is a force of friction of 2.7 N opposing the motion. what is the acceleration of the hockey puck?
Choices:
0.0054 m/s^2
0.005 m/s^2
200 m/s^2
190 m/s^2
Answer:
[tex]a=190\ m/s^2[/tex]
Explanation:
Mass of a hockey puck, m = 0.17 kg
Force exerted by the hockey puck, F' = 35 N
The force of friction, f = 2.7 N
We need to find the acceleration of the hockey puck.
Net force, F=F'-f
F=35-2.7
F=32.3 N
Now, using second law of motion,
F = ma
a is the acceleration of the hockey puck
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{32.3}{0.17}\\\\a=190\ m/s^2[/tex]
So, the acceleration of the hockey puck is [tex]190\ m/s^2[/tex].
The magnitude of acceleration of the hockey puck is 190 m/s² .
Given data:
The mass of hockey puck is, m = 0.17 kg.
the magnitude of external force on the puck is, F = 35.0 N.
The magnitude of force of friction is, f = 2.7 N.
We need to find the net force acting on the puck first. For that consider the applied force in the x-direction. Then net force is,
F' = F - f
Solving as,
F' = 35.0 - 2.7
F' = 32.3 N
Now, use the Newton's Second law to obtain the magnitude of acceleration (a) as,
F' = ma
Solving as,
32.3 = 0.17 (a)
a = 32.3/0.17
a = 190 m/s²
Thus, we can conclude that the magnitude of acceleration of the hockey puck is 190 m/s² .
Learn more about the Newton's law of motion here:
https://brainly.com/question/13447525
A climber of mass m slides down a vertical rope with an average acceleration a. What is the average frictional force exerted by the rope on the climber?
Answer:
m(g - a)
Explanation:
Since he slides with a mass 'm' and acceleration of "a", it means he is sliding in the position of gravity. Thus, Force = ma
Now, the force due to gravity = mg
The overall acceleration of the climber is downward along the rope. So "ma" is negative. Now, the only external forces acting on the person will be the force of gravity acting downward (W = mg) and the supporting Frictional Force F_f.
Thus, the net average frictional force of exerted by the rope on the climber will be;
mg - F_f - ma = 0
F_f = mg - ma
F_f = m(g - a)
A Galapagos tortoise weighs 59 Newtons (on Earth). What is its mass in kilograms?
Answer:
It is 6.02 kilograms.
Explanation:
One kilogram is equal to 9.81 Newtons. To convert Newtons to Kilograms,divide by 9.81. For instance, 20 Newtons would be equivalent to 20/9.81 or 2.04 kilograms
unlike other states of matter, what expand to fill their containers
Answer:
gas
Explanation:
Answer:
Person above me is big brain!
Explanation:
They are correct!
Give them some love and mark them as brainliest!
How can you find the frequency or period of ocean waves?
Answer: As you probably have seen in the ocean or a lake, the stronger the wind, the higher the waves. The period and wavelength can be expressed in terms of their reciprocals, the wave frequency ω = 2(pi)/T, and the wave number κ = 2(pi)/λ.
Explanation: To find the period, we solve for T=1f, given the value of the frequency (f=2s−1). T=12 s−1=0. 5 s. Since one definition of wavelength is the distance a wave has traveled after one complete cycle (or one period), the values for the wavelength (λ=0.9m) as well as the frequency are given.
what is the weight of a 500 kg boulder on the moon?
Answer:
F = 810 [N]
Explanation:
To solve this problem we must use the acceleration of gravity of the moon, which according to information provided by the internet we can see that the gravitational acceleration corresponds to 1.62 [m/s^2].
The weight of a body corresponds to the product of mass by gravity, so with the following equation we can find the weight.
F =m*g
F = 500 * 1.62
F = 810 [N]
When you must add three vectors together, what is not true this process? You must only give a magnitude of the resultant vector It does not matter what order you add the vectors You can move the vectors parallel to each other You must connect the head of each vector with the tail of the next vector
The addition of any numbers of vector provide the magnitude as well as the direction of the resultant vector, hence the mentioned first option is not true.
The addition of vector required to connect the head of the one vector with the tail of the other vector and any vector can be moved in the plane parallet to the previous location, so, the mentioned second and third options are true.
YO CAN YALL HELP ME IN DIS!
Answer:
i guess it will be mass or volume, but not sure
Explanation:
because the blocks volume will be same as the displaced water, then u will check the mass or volume of the water to see what the volume of a object will be.
A car travels from 20-meters to 60-meters in 10 seconds. Calculate the car's speed.
Answer:
8 m/s
Explanation:
All you have to do here is add 20 and 60 (giving you 80) and dividing by 10 seconds. 80/10= 8 m/s
Which of the following is not a property of electromagnetic waves?
Answer: It does not include alpha rays
Explanation: It does not include alpha rays
what are contact force and non contact force give example
Explanation:
Force is push or pull on a body.
Contact force is a force that requires contact. It acts between two body that touches on another.
Examples are pushing a car, ringing a bell, kicking a ball.
Non contact forces are forces applied to another object without contact. The action of this force is usually through a targeted force field.
Examples are magnetic force, gravitational force
What is linear motion?
Answer:
Linear motion is a one-dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension.
Explanation:
The specific heat capacity of water is 4,200 J/kg °C.
Calculate the thermal energy that must be
absorbed by 1.4 kg of water to increase its
temperature by 25 °C.
help TvT
What would happen if the electromagnet in an electric bell is replaced by an ordinary magnet
Answer:
The bell will not work as the Hammer will be attracted to the Gong and it will remain attracted because if there was an electromagnet the hammer will be released as soon as we stop pressing the switch but a Bar magnet is a permanent magnet and once it will get attracted to the Gong it will remain attracted.
Explanation:
Hope that helps!
Problem
Position The figure shows a motorcyclist traveling east along a straight
road. After passing point B, the cyclist continues to travel at an average
velocity of 18 m/s east and arrives at point C2.8 s later. What is the
position of point ?
Answer:
s = 50.4 m
Hence, the point C is 50.4 m towards east from point B
Explanation:
Since, the motorcyclist travels at a constant speed in straight line towards east after point B. Therefore, we can use the following equation in this case:
s = vt
where,
s = distance covered = position of point C = ?
v = uniform speed of motorcyclist = 18 m/s
t = time interval = 2.8 s
Therefore,
s = (18 m/s)(2.8 s)
s = 50.4 m
Hence, the point C is 50.4 m towards east from point B
Explain the energy needed for a liquid to evaporate into gas
100 kg = how many pounds
Answer:
220.462 pounds exact but you can round to 220 pounds
Explanation:
5. Select all of the following which are vector values. *
(3 Points)
Distance
Displacement
Speed
Velocity
Option 5
Acceleration
Answer:bum
Explanation:
A dog barks in a park and hears its echo after 0.5 seconds. The sound of its bark got reflected by a nearby building. The sound of speed in air is 346 m/s. The distance between the dog and the building is
Answer:
the answer is 173 m/s
Explanation:
the the sound traveled from the dog to the building and back to the dog in 0.5 seconds, every second passes the sound travels 346 m/s but if half a second passes then we divide 346 by 2 and get 173 m/s.
Testing for which type of property could lead to damaging the mineral sample?
A. physical properties
B. chemical properties
C. hardness
D. color
Answer: B. Chemical Properties
Explanation:
Which is the best reason a writer would use a unreliable narrator
Answer: Explanation:
Authors sometimes use an Unreliable Narrator to tell the story, a protagonist who can't be trusted to tell the events accurately. Either they are insane, evil, delusional, forgetful, or just plain wrong... whatever their reasons, the writer uses this technique to 'hook' the reader.
Answer: to give other characters something to react to
what does it mean mechanical advange is less than one?
Answer:
this happens when the input force is greater than the output force
HOPE IT HELPED YOU...
As a ball rolls downhill it increases in speed from 6 km/hr to 3 m/s in 5 seconds. What is
the acceleration of the ball in m/s squared?
(This question is also math)
Answer:
0.267 m/s^2
Explanation:
6 km/hr * 1hr/ 3600 sec * 1000m/ 1 km
1.67 m/s to 3 m/s
vf=vi+at
3 m/s= 1.67 m/s+ a(5 s)
a=0.267 m/s^2
1
Two beaker of water A and B , initially are at the same temperature.The temperature of the
water in beaker A is increased by 10F and the temperature of water in beaker B is increased
10 K. After these temperature change,which beaker of water has the higher temperature?
Answer :
beaker A , it is because the temperature increases is higher than beaker B.
Formula
(10°F − 32) × 5/9 + 273.15 = 260.928K
10 degrees fahrenheit = 260.928 kelvins
Formula
(10K − 273.15) × 9/5 + 32 = -441.7°F
10 kelvins = -441.67 degrees fahrenheit
beaker A , 10°F = -12.222 °C
beaker B , 10k = -263.15 °C
Beaker A of water will have a higher temperature than the temperature of beaker B.
How to change the temperature from Fahrenheit to Celcius?To convert the temperature Fahrenheit to Celsius formula is used from the scale Fahrenheit to Celsius. Both scales provide a way to measure the object’s hotness and coldness and are used to measure the temperature. The symbol used to express Fahrenheit is °F while the symbol used for Celsius is °C.
The formula used to change the temperature from Fahrenheit to Celsius as follows:
°C = (°F- 32)5/9
The temperature of beaker A is increased by 10°F. So the change in temperature in the Celcius scale is :
T(°C) = (10- 32)5/9
T(°C) = -12.22°C
The temperature of beaker B is increased by 10 K, then the temperature in Celcius is:
T(°C) = 10 - 273.15
T(°C) = - 263.15°C
Therefore, the temperature of beaker A will be higher after these changes if initially, both are at the same temperature.
Learn more about Fahrenheit and Celcius, here:
https://brainly.com/question/1999399
#SPJ2
