A constant 9-N net force acts on an object for 2 seconds. What is the impulse of the force? What is the momentum change of the object? A) 4.5 Ns B) 9 Ns C) 36 Ns D) 18 Ns

A 156-gram baseball is hit toward the left by a bat. The magnitude of the force the bat exerts on the ball as a function of time is shown in (Figure 1). -magnitude of impulse = 12 N*s -Magnitude of the ball's velocity when it is at rest = 77 m/s a)what is the magnitude of the ball's velocity after it is hit if it is initially moving to the right at 31 m/s  b)what is the direction of this velocity?

A 0.03 kg ball is thrown horizontally along the (+) x-axis directly towards a wall with a speed of 12 m/s. The ball bounces straight back with a speed of 8 m/s.The impulse of the wall on the ball is: A.) -0.6 kg m/s B.) 1.20 kg m/s C.) -0.2 kg m/s D.) 0.10 kg m/s

QUESTION 15 When two billiard balls collide, the collision force as a function of time follows the graph shown below. What is the magnitude of the impulse during the collision? F(N) 500 250 - t(ms) 0.0 2.0 4.0 6.0 O a. 1.2 N-s b. 1.0 N-s OC. 0.80 N-s Od.0.50 N-s e.n20 N o

E6.) A ball experiences a change in momentum of 24 kg-m/s.a. What is the impulse acting on the ball?b. If the time of interaction is 0.15 s, what is the magnitude of the average force acting on the ball? Answer with the correct formula.

movement. 12. A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the momentum during the collision are correct? * a. The momentum of the car-truck system is conserved, but the momentum of each one separately is not conserved. b. The momentum of the truck is conserved. c. The momentum of the truck and the car are each conserved. O d. The momentum of the car is conserved. O e. The car and truck must undergo the same change in speed. hp 7. 8

Two cars are on a track, and they collide. Cart, has initial momentum of +5kgm/s, and final momentum -3kgm/s   Cart 2 has momentum initially of -4kg m/s and final momentum of +4kg m/s. Explain what you think about the frition on the track.

A closed system has 2 objects.Total momentum of the closed system is measured to be 120kg m/s. After 2 collisions and 4hr later what is the total momentum of the system.   A. -240 kgm/s   B. 240kgm/s   C. 60kgm/s   D. 120kgm/s

8.) In this photo, a fire extinguisher provides the impulse for a hallway rocket cart. Which is NOT true about the motion of the rocket cart and person? a.) The cart and person are propelled as a result of gas from the fire extinguisher pushing against air in the room. b.) The force of the gas on the cart and person is equal and opposite to the force of the person and cart on the expelled gas.      c.) The momentum of the cart and person is equal in magnitude and opposite in direction to the momentum of the expelled gas.

Two cars have the same mass. Car 1 is travelling northward at a speed of 45 mi/hr. Car 2 is travelling southward at a speed of 45 mi/hr. The cars a)  have the same momentum and kinetic energy. b)  have the same momentum but different kinetic energies. c)  have different momenta but the same kinetic energy. d)  Have different momenta and kinetic energy.