physicssss

6. A soccer player applies a force of 180 N during a kick. The kick accelerates a 0.45 kg soccer ball from rest to a speed of 18 m/s. What is the impulse imparted to the ball? What is the collision time? (Ans: 8.1 Ns, 0.045 secs) 7 A stuntman of mass 77 kg , steps out of high beam and "belly-flops" on a shallow pool of water from a height of 1 1m. When he hits the pool, he comes to rest in about .05 s. What is the impulse that the water deliver to his body during this time interval? What is the force? (Ans:1 142 Ns, 22841.8 N) 8. A football team's kicker punts the ball (mass = 0.4 kg) and gives it a launch speed of 30 m/s. Find the impulse delivered to the football by the kicker's foot and the average force exerted by the kicker on the ball, given that the impact time was 0.008 s. (Ans: 12 N.s; 1,500 N) 9 An 80 kg stuntman jumps out of a window that is 45 m above the ground. (a) How fast is he falling when he reaches the ground? (b) He lands on a large, air-filled target coming to rest in 1.5 s. What force does he feel while coming to rest? (c) What if he had instead landed on the hard ground with an impact time of0.010 s? (Ans: (a) -30 m/s, (b) 1600N, (c) 240000 N) 10. A 1000 kg car is traveling east at 15 m/s and is hit from behind and receives a forward impulse of 6000 N.s. Determine the magnitude of the car's change in momentum due to this impulse. (Ans:6000 N's)