Answer:968 m/s
Explanation:
If a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s, then the distance traveled by the race car would be 343 m.
What are the three equations of motion?There are three equations of motion given by Newton
The first equation is given as follows
v = u + at
the second equation is given as follows
S = ut + 1/2×a×t²
the third equation is given as follows
v² - u² = 2×a×s
As given in the problem Question a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s,
initial velocity = 22 m/s
final velocity = 44 m/s
time = 11 s
By using the first equation of motion,
v = u + at
44 = 22 + 11a
11a = 22
a = 2 m/s²
By using the second equation of motion,
S = ut + 1/2*a*t²
u= 22m/s , a= 2m/s² and t = 11seconds
S = 22*11 + 0.5*2*11²
S = 222+121
S= 343 m
Thus, the distance covered by the race car would be 343 m.
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A train is running at a speed of 60 m/s . what will this speed be in km/h ?
Speed in m/s=60m/s
Speed in km/h
[tex]\\ \sf\longmapsto 60\times \dfrac{5}{18}[/tex]
[tex]\\ \sf\longmapsto \dfrac{300}{18}[/tex]
[tex]\\ \sf\longmapsto 16.6km/h[/tex]
A red car travels 400 m in 20s. A blue car travels 660m in 30s. Which car has the greater average speed?
Answer:
The Blue Car has a greater average speed at 22 m/s.
Explanation:
Red car average = 400 / 20 = 20 m/s
Blue car average = 660 / 30 = 22 m/s
A diver has a mass of 90 kg. If he climbs ip a diving platform 12m high, how much potential energy does he have.
Answer:
10,584 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 90 × 9.8 × 12 = 10,584
We have the final answer as
10,584 JHope this helps you
Question 12…..plz help
Answer:
1 I am not sure but I tried
Consider a ladder placed against a frictionless wall. What happens to the friction force between the ladder and the floor as you climb up the ladder
Answer:the friction increase
Explanation:
that's all i got
Lichens are not single organisms, but algae and fungi that function together. The algae use photosynthesis to make food for both organisms. The fungi produce digestive chemicals and absorb nutrients for both organisms.
How does the biological activity of lichens cause weathering in rocks?
Answer options with 4 options
A.
Lichens cause friction as they grow, which weathers the rocks.
B.
Lichens produce chemicals, which dissolve and weather the rocks.
C.
Lichens take in water, which freezes in cracks and weathers the rocks.
D.
Lichens absorb heat during photosynthesis, which weathers the rocks.
Answer please
Answer:
The correct answer is B
Lichens produce chemicals which dissolve and weather the rocks.
ANSWER THIS QUESTION!!!! PLSSSSS!!! NEED HELP!!!!! 10 POINTS
Why would oxygen levels make a difference in athletic performance?
A.
Muscles need oxygen to function well.
B.
It is just one biometric that is studied.
C.
Oxygen is important for everyone, not just athletes.
D.
Athletes require less oxygen than those who are less active.
PLEASE NO LINKS (ONLY ANSWER)
Answer:
A. it's the only answer that makes sense. if I'm wrong sorry
What is the centripetal force exerted on a 3.21 kg mass that is orbiting at a speed of 4.57 m/s around a circle, radius 0.68 m?
Question 6 options:
1)
9.98 N
2)
30.7 N
3)
21.6 N
4)
316 N
5)
98.6 N
Answer:Centripetal acceleration = v²/r = 8²/0.50 = 64/0.50 = 32
Centripetal force = mass * acceleration = 3 * 32 = 96 Newton
So, your answer is 96 Newton
Explanation:
Is vaping bad for u?
Random
Answer:
yes
Explanation:
it damages your lungs
Answer:
yes it can mess you lungs up real bad
The soccer player is running at a speed of 4 m/s when he slides on the ground, coming to a stop in a distance of 2 m. What was his acceleration?
A ball is thrown horizontally from the top of a tower at 30m high, and lands 15m from its base. What is the ball's initial speed?
Answer:
This question requires gravitational acceleration,t=（2h/g）^ 1/2,Level the initial speed is 15/t.
What type of energy does the horse have because of its motion?
A. Elastic
B. Kinetic
ООО
C. Gravitational
D. Potential
is the horse running/moving? if so then kinetic i believe
What is the dissolved substance in a solution? A.particles B. solute C.solvement D.water
Answer:
Solute
Explanation:
a solute is dissolved into a solvent to make a solution
Answer:
the answer is solute
because solutes are what are to be dissolved in solvents to form solutions
OIOIOIOIOI
Is it possible to be in 2 places at once??!?!?!??!?!??!?!?!?
PLZ HELP PLZZZZZZZZZZZZZ
Answer:
No
Explanation:
NO
Answer:
ok i don't think you could but if you were cut in half you could soo I say yes you could
Explanation:
Whats three things that determine the amount of potential energy
A rescue pilot drops a survival kit while her plane is flying at an altitude of 2000.0 m with a forward velocity of 100.0 m/s. If air friction is disregarded, how far in advance of the starving explorer's drop zone should she release the package?
Answer:
H = 1/2 g t^2 no original vertical velocity
t = (2 * 2000 / 9.8)^1/2 = 20.2 s
Sx = 100 m/s * 20.2 s = 2020 m
A rescue pilot drops a survival kit while the plane is flying at an altitude of 2000 m then the distance travelled by the package after the drop will be 2020 meters.
What is Friction?A force that prevents two solid objects from smoothly sliding or rolling over one another is known as friction. While frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. To overcome frictional forces in the moving parts, automotive engines use about 20% of their total power.
The main contributor to friction between metals appears to be adhesion, or the forces of attraction, between the contact regions of the surfaces, which are always microscopically uneven.
According to the question,
H = 1/2 g t²
2000 = 1/2(9.8) t²
t² = 4000/ 9.8
t = 20.2 seconds.
So the distance travelled by the package will be :
Distance = s × t
Distance = 100 m/s × 20.2 s
Distance = 2020 meters.
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PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Tonya has been working a lot and has not been able to maintain healthy habits, like diet and exercise, as well as she normally does. This has meant a lot of late nights and eating take-out instead of preparing meals herself. What is the likely result of this change in behavior?
A.
She is at high risk for obesity.
B.
She will probably gain a little weight.
C.
If she is young, there will be no impact.
D.
If she is exercising at all, the effects will be minimal.
PLEASE NO LINKS
Tonya has been working a lot and if she is not able to maintain her healthy then she will probably gain a little weight. Hence, option B is correct.
What is Diet?Diet, in the context of nutrition, refers to the items that a person frequently eats and drinks (or a group). A regulated diet, or one that satisfies a person's physical needs, may be used during a specific illness therapy or health condition management.
For instance, a diabetic's diet may be limited to a variety of foods and beverages that help control blood sugar levels. Numerous fiber, non-starchy fruits, and vegetables are included in the diet suggested for diabetic patients. Because starchy foods are high in carbohydrates, eating a lot of them could raise your blood sugar levels.
If Tonya has been working a lot and is not able to maintain healthy habits as she normally does then she will gain some weight. But she must make sure to start a healthy lifestyle as soon as possible because in a long run this habit can affect her health very badly.
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what are 10 main things that make up out observable universe
Answer:
Spaghetti.
Explanation:
URGENT!! 100 Points (NO LINKS! Those answers will be reported)
A car jack with a mechanical advantage of 6 needs to produce an output force of 360 N to raise a car. What input force is required?
(Must include the correct unit and must show work)
Answer:
60N
Explanation:
6 times 60 =360 which is the amount so 60 n.
explain how cold water masses form
Please help if you can!
Answer:
Illuminated
Explanation:
I think but not sure
What is the speed of a jet plane that travels 3000 meters in 10 seconds?
Answer:
300 m/s
Explanation:
The main source of energy for living things on earth is what?
if 770 grams of metal requires 155 calories of energy to raise its temperature by 10 kelvin what is its specific heat
The specific heat capacity of the metal of mass 770 g which required 155 calories to raise its temperature by 10 kelvin is 0.02 Cal/gK
From the question given above, the following the following data were:
Mass of metal (M) = 770 g
Heat (Q) required = 155 calories
Change in temperature (ΔT) = 10 K
Specific heat capacity (C) =?The specific heat capacity of metal can be obtained as illustrated below:
Q = MCΔT155 = 770 × C × 10
155 = 7700 × C
Divide both side by 7700
C = 155 / 7700
C = 0.02 Cal/gKTherefore, the specific heat capacity of metal is 0.02 Cal/gK
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block a of mass 4m is attached by a light string to block b of mass 2m. the string passes over a pulley with negligible friction and of negligible mass. block a is held a distance h above the ground, as shown. the blocks are released from rest, and block a reaches the ground two seconds later. the value of h is most nearly
The kinematics and Newton's second law allow us to find the height from which the block system descends is:
y = 6.54 m
Given parameters
Body mass m1 = 4 kg The mass of the body on the ground m² = 2 kg The descent time t = 2sTo find
Body height
Newton's second law gives a relationship between the net force, the mass, and the acceleration of the body.
∑ F = m a
Where the bold letters indicate vectors, F is the force, m the mass and the acceleration of the body.
Kinematics studies the movement of bodies, looking for relationships between position, velocity and acceleration
y = v₀ t + ½ a t²
In the attached we have a free body diagram of the system, let's write Newton's second law.
T - W₁ = m₁ a
-T + W₂ = m₂ a
Let's solve the system of equations.
W₂ - W₁ = (m₁ + m₂) a
a = [tex]\frac{m_2-m_1}{m_2+m_1} \ g[/tex]
Let's calculate
a = [tex]\frac{2 -4}{ 2 +4} \ 9.8[/tex]
a = -3.27 m / s²
The negative sign indicates that the heaviest body is descending.
Now we can use kinematics to find the height, as the system comes out of rest the initial velocity is zero, when he reaches the ground his height is zero.
y = y₀ + v₀ t + ½ a t²
0= y₀ + 0 +½ a t²
Let's calculate
y₀ = ½ 3.27 2²
y = 6.54 m
In conclusion, using kinematics and Newton's second law we can find the height from which the block system descends is:
y = 6.54 m
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what makes something magnetic?
công thức tính điện trường
IM SORRY IF ITS WRŌÑG BUT I HOPE IT HELPS
Suppose that you push on a heavy desk, but it does not move. What force opposes your push? How do you know that the opposing force balances the focus that you excerpt? (section 3 friction a force that opposes motion standard standards)
Answer:
friction doesn't let the desk move.
Explanation:
the law of motion states any object in motion should stay in motion.
A space ship travels 234500000 kilometers in 15 hours. What was the average speed of the space ship in m/s?
Answer:
4,342,592.59
Explanation:
234500000/15= 15,633,333.33
15,633,333.33*5/18=4,342,592.59
A baseball batter hits an incoming 40-m/s fastball. The ball leaves the bat at 50 m/s after a ball-on-bat contact time of 0.030 s. What is the force exerted on the 0.15-kg baseball? a. 450 N b. 1250 N c. 90 N d.50N
