Just before it is struck by a racket, a tennis ball weighing 0.560 N has a velocity of (20.0 m/s)i - (4.0 m/s)j. During the 3.00 ms that the racket and ball are in contact, the net force on the ball is constant and equal to -(380 N)i + (110 N)j. Part A What is the a -component of the impulse of the net force applied to the ball? Express your answer with the appropriate units. HA J = Value Units Part B What is the y-component of the impulse of the net force applied to the ball? Express your answer with the appropriate units. ? Jy = Value Units Part C What is the g-component of the final velocity of the ball?

In a softball game, a 0.2 kg ball crosses the plate at 10 m/s at an angle of 45° on its way down. The batter hits the ball toward center field, giving it a velocity of 45 m/s at 30° above the horizontal. a. Determine the impulse given to the ball. b. If the force on the ball increases linearly for 4 ms, holds constant for 20 ms, and then decreases to zero linearly in another 4 ms. i) What is the average force on the ball? ii) What is the peak force on the ball? 4

m Q6. A 6.0 kg block is sliding to the east across a horizontal, frictionless surface with a momentum of 30 kg. It strikes an obstacle. The obstacle exerts an impulse of 10 N.s to the west on the block. Find the speed of the block after the collision. (3.3 m/s)

A skydiver is dropped out of an airplane. Her weight is 650 Neetons.  a. The skydiver free-falls and then she opend her parachute, from that point on she falls with a constant speed of 8.00 m/s. Determine her momentum (magnitue and direction) the instant before she hits the ground.  b. Her impact with the ground occurs over a period of 0.0800 seconds afterwards she is at rest. Determine the force of the ground on the skydiver (magnitude and direction).  c. Determine the force of the skydiver on the ground (magnitude and direction). Explain! d. What can the skydiver do to reduce the force on her body during her impact with ground?

A 3.4 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired horizontally at a speed of 480 m/s, goes completely through the block, emerging at a speed of 250 m/s. Part A What is the speed of the block immediately after the bullet exits? Express your answer with the appropriate units. V= Value Submit μA Provide Feedback Request Answer Units ? 208

A 1.25 kg hockey puck slides on a horizontal, frictionless surface at 3.0 m/s when it is struck by a 0.050 kg bullet traveling perpendicularly to the puck at 180 m/s. The bullet becomes wedged inside the puck. The sketch shows the view from above. After the collision, the speed of the composite puck/bullet object is_____m/s. O A

A 0.055-kg egg falls off a table that is 1.2 m high and lands on a tile floor.   Part A What is the impulse delivered to the egg by the floor? Assume that the positive direction is upward. Express your answer with the appropriate units. Part B The egg lands on its side, and at the instant of impact the part of the shell farthest from the floor is 40 mm above the floor. The collision continues until the center of mass is on the floor. Estimate the time interval over which the collision lasts, assuming that the speed of the center of mass of the egg drops to zero linearly in time. Express your answer with the appropriate units.   Part C What is the average force exerted by the floor on the egg? Assume that the positive direction is upward.   Express your answer with the appropriate units.   Part D If the floor were carpeted, the collision time interval might be extended by as much as a factor of four as the carpet "gives" under the egg. What would the average force…

An ice hockey player of mass m1 = 81.5 kg hits a puck of mass m2 = 0.165 kg, giving the puck a speed of v = 35 m/s. a. If both are initially at rest and if the ice is frictionless, how far, in terms of the variables in the problem, does the player recoil in the time it takes the puck to reach the goal, a distance d away?  b. If both are initially at rest and if the ice is frictionless, how far, in centimeters, does the player recoil in the time it takes the puck to reach the goal, 15 m away?

A 0.0600 kg ball is traveling horizontally at 17.0 m/s when it is hit by a tennis racquet. The ball then moves in the opposite direction, also horizontally, at a speed of 35.0 m/s. Take the initial velocity of the ball to be in the −x-direction. a) What is the impulse delivered to the ball by the tennis racquet? (Give the x-component in N · s. Indicate the direction with the sign of your answer.) b) Some work is done on the system of the ball and some energy appears in the ball as an increase in internal energy during the collision between the ball and the racket. What is the quantity W − ΔEint for the ball? (Give your answer in J.)

A 1390 - kg car moving at 6.00 m/s is initially traveling north along the positive direction of a y axis. After completing a 90° right-hand turn to the positive x direction in 5.00 s, the inattentive operator drives into a tree, which stops the car in 480 ms. In unit-vector notation, what is the impulse on the car during the turn? 2 + Submit Answer Tries 0/40 In unit-vector notation, what is the impulse on the car during the collision? 2 3 Submit Answer Tries 0/40 What is the Submit Answer What is the magnitude of the average force that acts on the car during the turn? Tries 0/40 magnitude of the average force that acts on the car during the collision? Submit Answer What is the Submit Answer Tries 0/40 Tries 0/40 direction of the average force during the turn? Post Discussion 4 Send Feedback