An 80 kg running back leaps straight ahead toward the end zone with a speed of 8 m/s. A 110 kg line-backer is keeping his feet on the ground, catches the running back and applies a force of 800N in the opposite direction for 0.5 s before the running back’s feet touch the ground. 13. Determine the impulse that the line-backer imparts to the running back. a. 400 N-s c. 240 N-s b. 650 N-s d. 640 N-s 14. Determine change in the running back’s momentum does the impulse produce. a. 400 N-s c. 240 N-s b. 650 N-s d. 640 N-s 15. Determine the running back’s momentum when his feet touch the ground. a. 400 N-s c. 240 N-s b. 650 N-s d. 640 N-s

1. A0.12-kg ball is moving at 6 m's when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s. What is the magnitude of the change in the momentum of the ball? a. 0.39 kg m's b. 0.42 kg-m's c. 1.3 kg-m's d. 2.4 kg-m's 2. Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s, and just after is 3.5 m's. What is the magnitude of the change in the ball's momentum? a. 0.09 kg-m/s b. 1.5 kg-m/s c. 4.3 kg-m/s d. 126 kg -m/s

4. A 0.060 kg ball hits a wall with an initial speed of 30 m/s in the -x direction and bounces off with the same speed in the +x direction. The graph shows the force of the wall on the ball during the interaction. a) Draw the ball and the wall just before and just after the collision. b) What is the impulse of the force of the wall on the ball? b) What is the maximum value of the contact force Fmax between the wall and the ball? Fmax t (ms) 6 4.

A time-dependent force, F(t) = (8t + 9t^2) N, acts in the x-direction on a 2.0 kg stationary object. Find the momentum of the object in the x-direction after the force has acted for 1 s.

1. Calculate the magnitude of the impulse during the collision. 2. Calculate the magnitude and direction of the velocity of the 4.0 kg cart after the collision. 3. Calculate the mass m of the second cart

1.A 26.2-kg dog is running northward at 2.70 m/s, while a5.30-kg cat is running eastward at 3.04 m/s. Their 74.0-kgowner has the same momentum as the two pets taken together.Find the direction and magnitude of the owner’s velocity. Explain and draws.

When a truck drives into a haystack, it doesn’t get damaged. When it drives into a concrete wall, there is a lot of damage. Both cases have the same initial speed for the truck and the same final speed as well. What is the difference between these two cases? A) The initial momentum is less when it strikes the haystack.B) The impulse is less when striking the haystack C) The change in momentum is less when striking the haystackD) Force of impact is less when striking the haystack   If you want to hit a volleyball without making it spin, you must apply a force A) Acting below the center of mass B) Acting above the center of massC) Acting through the center of massD) It is impossible to not make it spin

A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E 12.50 kg m's.