A ball with mass 230 g is travelling horizontally to the right at 5.0 m·s. It rebounds against a wall and moves to the left, also horizontally, with an initial speed of 3.8 m ·s1. It is in contact with the wall for 39 ms. (Neglect any vertical motion.) Taking right as the positive direction, what is the average force exerted by the wall on the ball during the collision?

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Chapter1: Units, Trigonometry. And Vectors
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[#424] Bouncing ball
A ball with mass 230 g is travelling horizontally to the right at 5.0 m ·s1. It rebounds against a wall and moves to the left, also horizontally, with an initial speed of
3.8 m ·s1. It is in contact with the wall for 39 ms. (Neglect any vertical motion.) Taking right as the positive direction, what is the average force exerted by the wall on the
ball during the collision?
Average force exerted = N to the right. (use the correct number of sig figs!)
Enter answer here
[#425] Accelerating a car
A car has a mass of 1100 kg. What average force is required to accelerate it to 21 m/s in 11 s in a straight line?
Give your answer in kN. Magnitude of the required force =
kN. (use correct number of sig figs)
Transcribed Image Text:[#424] Bouncing ball A ball with mass 230 g is travelling horizontally to the right at 5.0 m ·s1. It rebounds against a wall and moves to the left, also horizontally, with an initial speed of 3.8 m ·s1. It is in contact with the wall for 39 ms. (Neglect any vertical motion.) Taking right as the positive direction, what is the average force exerted by the wall on the ball during the collision? Average force exerted = N to the right. (use the correct number of sig figs!) Enter answer here [#425] Accelerating a car A car has a mass of 1100 kg. What average force is required to accelerate it to 21 m/s in 11 s in a straight line? Give your answer in kN. Magnitude of the required force = kN. (use correct number of sig figs)
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