Review. After a 0.300-kg rubber ball is dropped from a height of 1.75 m, it bounces off a concrete floor and rebounds to a height of 1.50 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contatact with the floor and use this estimate to calculate the average force the floor exerts on the ball.

(a) What impulse must be imparted to a golf ball of mass 0.100 kg to give it a velocity of 70.0 m/s? (b) If the golf club is in contact with the ball as it is accelerated over an interval of 1.00 cm, estimate the average force exerted on the ball by the club

A professional boxer hits his opponent with a 1075 N horizontal blow that lasts 0.190 s. The opponent's total body mass is 105 kg and the blow strikes him near his center of mass and while he is motionless in midair. (a) Determine the impulse (in kg m/s) the boxer imparts to his opponent by this blow. kg m/s (b) Determine the opponent's final velocity (in m/s) after the blow. m/s (c) Calculate the recoil velocity (in m/s) of the opponent's 5.0 kg head if hit in this manner, assuming the head does not initially transfer significant momentum to the boxer's body. m/s

An estimated force-time curve for a baseball struck by a bat is shown in the figure below. Let Fmax = 19 000 N, ta = 1.5 ms, and to = 2 ms. F(N) Fmax 1₂ to From this curve, determine each of the following. 0 (ms) (a) the magnitude of the impulse delivered to the ball N.S (b) the average force exerted on the ball KN

A 1500 kg car accelerates from 15 m/s to 25 m/s. Calculate the impulse experienced by the car.

The linear impulse delivered by the hit ofa boxer is 95.4 N · s during the 0.122 s ofcontact.What is the magnitude of the average forceexerted on the glove by the other boxer?Answer in units of N.

19. IP A 0.14-kg baseball moves toward home plate with a ve- locity V₁ = (-36 m/s)x. After striking the bat, the ball moves vertically upward with a velocity v = (18 m/s)ŷ. (a) Find the direction and magnitude of the impulse delivered to the ball by the bat. Assume that the ball and bat are in contact for 1.5 ms. (b) How would your answer to part (a) change if the mass of the ball were doubled? (c) How would your answer to part (a) change if the mass of the bat were doubled instead?

A truck with a mass of 1480 kg and moving with a speed of 17.0 m/s rear-ends a 732 kg car stopped at an intersection. The collision is approximately elastic since the car is in neutral, the brakes are off, the metal bumpers line up well and do not get damaged. (a) Calculate the initial momentum of the truck (in kg m/s).  kg m/s (b) Calculate the final velocities (in m/s) for the truck and the car. vtf= m/svcf= m/s (c) Calculate the total momentum (in kg m/s) of the truck AND the car after the collision.  kg m/s (d) Did you expect the results that you got for Part (a) and (c)? Yes, since the collision is inelastic. No, since there were no forces acting on either the car or the truck during the collision.      Yes, since momentum is conserved in a collision with no external forces acting on the colliding objects. No, since kinetic energy may not be conserved.

9. An athlete who is initially at rest in a squatted position jumps vertically upward and then lands going back to the original squatted position (ending at rest with the same center of mass height as at the start). The time period under consideration begins just before the athlete starts the upward motion and ends just after she has landed and comes to rest back in the squatted position. Compare the magnitude and directions of the impulse from the force of the ground on the athlete to the impulse from gravity on the athlete during this time period. Note: there are no other significant forces other than the ground and gravity acting on the athlete during this time period. of

A man who could only find a 75-kg blue rock nearby decides to drive a metal beach umbrella pole down into the soft sand of Galveston beach by dropping it straight down from a resting height of 2.3 meters. If the blue rock does not rebound off the pole just after contact (that means bouncing back and possibly hitting him in the head) then calculate the impulse the rock places on the umbrella pole. Assume the metal beach umbrella has a total mass of 175-kg