If the answer to the previous problem was 8.00 i kg m/s (because the initial velocity of the ball was different) and a slow-motion replay indicated the bat contacted the ball for 20 ms, what was the magnitude of the average force with which the batter hit the ball? (A) 0.16 N (B) 0.32 N (C) 0.40 N (D) 0.80 N (E) 160 N (F) 400 N

When spiking a volleyball, a player changes the velocity of the ball from 4.2 m/s to -24 m/s; along a certain direction. If the impulse delivered to the ball by the player is -9.3 kg.m/s, what is the mass of the volleyball?

In the overhead view of the figure, a 275 g ball with a speed v of 4.0 m/s strikes a wall at an angle of 30° and then rebounds with the same speed and angle. It is in contact with the wall for 13.5ms. (a) What is the impulse on the ball (take positive as down in the figure)?

A tennis ball and a bag filled with sand have the same mass. They are dropped from the same height and they hit the ground. The bag of sand stays on the ground, while the tennis ball rebounds. Which experiences the larger impulse from the ground?

2. You want to estimate from how high if it is safe to jump onto a concrete floor. For this, you consider impulse and the force of impact. If you jump from a chair of height of 0.50 m, and land on a concrete floor with stiff legs, it just starts to hurt. Therefore, you consider the average force on your body in such a landing to be your ‘safe limit’. In this case, you estimate that your body moves by about 0.75 cm during the landing. If you allow yourself to bend your knees upon landing on the same concrete floor, you are able to mitigate the force of impact. You estimate that, when bending your knees during landing, your body moves by about a foot, or 0.30 m. For the purpose of this exercise, you consider yourself with a mass of 60 kg.Given the estimates made above, from how high can you safely jump onto a concrete floor?

According to the Guinness Book of World Records, the fastest recorded baseball pitch was delivered by Nolan Ryan in 1974. The pitch was clocked at 100.9 mi/hr (45.0 m/s). Determine the impulse required to give a 0.145-kg baseball such a momentum in N-s.

A cricket ball of 200 g travelling horizontally with a speed of 50 m/s hits a wall and coming back again with a speed of 30 m/s. What is the magnitude of change in linear momentum of the ball? Select one: a. 4 kg.m/s b. 400 kg.m/s c. 16 kg.m. d. 4000 kg.m/s

1. Below is a velocity-time graph of a marathon runner running down a racetrack over a period of 8 seconds. v (m-s-1) t(s) A. Solve for the acceleration of the runner during the first 4 seconds.

Two equal mass balls (one white and the other black) are dropped from the same height, and rebound off the floor. The white ball rebounds to a higher position. Which ball is subjected to the greater magnitude of impulse during its collision with the floor? 
Explain.

24.A 2.4 kg ball drops vertically onto a floor, hitting with a speed of 25 m/s. It rebounds with an initial speed of 10 m/s. (a) What impulse acts on the ball during the contact?(b) If the ball is in contact with the floor for 0.020 s, what is the magnitude of the average force on the floor from the ball? a. 42 kg m/s, 2100N b. 84 kg m/s, 4200N c. 84 kg m/s, 2100N d.42 kg m/s, 4200N