11. Momentum & Impulse

A 250 g rubber ball bounces off a wall. As it strikes the wall, it is moving in the negative x-direction at $11\text{m/s}$, and as it bounces off, it is moving in the positive x-direction at $10\text{m/s}$. What is the impulse on the ball from the wall?

What is the momentum of a 600 kg car traveling at $16\text{m/s}$  (about 35 mph)?

Three cars approach an intersection: an 800 kg car moves in the positive x-direction at $10\text{m/s}$, a 1200 kg car moves in the negative x-direction at $5\text{m/s}$, and a 900 kg car moves in the positive y-direction at $12\text{m/s}$. What is the total momentum of this system of three cars? Give your answer as a magnitude and an angle counterclockwise from the positive x-axis.

Two vehicles are approaching an intersection. One is a 2500-kg pickup traveling at 14.0 m/s from east to west (the -x-direction), and the other is a 1500-kg sedan going from south to north (the +y-direction) at 23.0 m/s. (b) What are the magnitude and direction of the net momentum?

Two vehicles are approaching an intersection. One is a 2500-kg pickup traveling at 14.0 m/s from east to west (the -x-direction), and the other is a 1500-kg sedan going from south to north (the +y-direction) at 23.0 m/s. (a) Find the x- and y-components of the net momentum of this system.

What are the velocities of (b) a 75 kg skydiver falling with p = -4100j kg m/s

At what speed do a bicycle and its rider, with a combined mass of 100 kg, have the same momentum as a 1500 kg car traveling at 5.0 m/s?

FIGURE EX11.6 is an incomplete momentum bar chart for a collision that lasts 10 ms. What are the magnitude and direction of the average collision force exerted on the object?

A tennis player swings her 1000g racket with a speed of 10 m/s .She hits a 60g tennis ball that was approaching her at a speed of 20 m/s . The ball rebounds at 40 m/s. b. If the tennis ball and racket are in contact for 10 ms, what is the average force that the racket exerts on the ball? How does this compare to the gravitational force on the ball?

CALC A particle of mass m is at rest at t=0 . Its momentum for t>0 is given by px = 6t² kg m/s ,where t is in s. Find an expression for Fx (t) , the force exerted on the particle as a function of time.

CALC A 500 g particle has velocity vx = −5.0 m/s at t=−2 s .Force Fx= (4−t²) N , where t is in s, is exerted on the particle between t=−2 s and t=2 s . This force increases from 0 N at t=−2 s to 4 N at t=0 s and then back to 0 N at t=2 s . What is the particle's velocity at t=2 s?