A 55 g tennis ball approaches a player horizontally at a speed of 8.0 m/s. The player hits the ball with a racquet in a  collision that lasts 5.0 ms. to return the ball with a horizontal speed of 7.0 m/s.  How much average force must the player apply?

A 0.15 kg baseball is moving at 35 m/s toward home plate when it is hit with the bat. The ball is in contact with the bat for 0.0019 s, and leaves the bat at 25 m/s directly away from home plate. Determine the average force exerted by the bat on the ball.

Two bumper cars at the county fair are sliding toward one another (see figure below). Initially, bumper car 1 is traveling to the east at 5.70 m/s, and bumper car 2 is traveling 79.1° south of west at 4.25 m/s. They collide and stick together, as the driver of one car reaches out and grabs hold of the other driver. The two bumper cars move off together after the collision, and friction is negligible between the cars and the ground. W-OE Car 2 Car 1 Vii (a) If the masses of bumper cars 1 and 2 are 596 kg and 625 kg respectively, what is the velocity of the bumper cars immediately after the collision? magnitude m/s direction ° east of south (b) What is the kinetic energy lost in the collision?

To test the impact resistance of a new material, a steel ball is shot through bricks of the material. Two bricks, each with a mass of 1.5 kg, are resting on a frictionless surface, a short distance apart from each other. A steel ball, with a mass of 0.118 kg, is shot into the first brick with a velocity of 174 m/s, and after passing through the first brick, it embeds itself in the second brick. The first brick has a velocity of 1.83 m/s right after the ball leaves. What is the velocity of the second brick with the embedded ball?

A baseball has a mass of 0.140 kg, and it is pitched towards home plate at a speed of 48.0 m/s. Assume that the ball is pitched horizontally and that the ball is hit horizontally back in the opposite direction. If the bat exerts an average force of 9100 N for 2.80 ms, what is the final speed of the ball in m/s?

As shown in the figure, a wooden ball with mass m₂ is initially at rest on a horizontal, frictionless table. A second wooden ball with mass m₁ moving with a speed 2.00 m/s, collides with m₂. Assume m₁ moves initially along the +x-axis. After the collision, m₁ moves with speed 1.00 m/s at an angle of 0 = 53.0° to the positive x-axis. (Assume m₁ = 0.200 kg and m₂ 0.300 kg.) a my = Before the collision Vi mq b After the collision (a) Determine the speed (in m/s) of the 0.300 kg ball after the collision. m/s "If sin 0 Vof sin o Vif cos Fif Vof Cosp 2f (b) Find the fraction of kinetic energy transferred away or transformed to other forms of energy in the collision. |AK| K₁ =

A 375 gram basketball is bounced off of a wooden board, as shown below. It is moving straight down at a speed of 4.75 m/s just before hitting the board, and it is moving with a speed of 3.75 m/s at an angle of 27.5 degrees above the horizontal just after. The ball is in contact with the board for a total of 68.5 milliseconds (ms). A)Find the average force that the board exerts on the ball during the bounce. Give the magnitude of the force in units of Newtons. Give the direction of the force as an angle from the x-axis, in degrees.  B) How much kinetic energy is lost as a result of the ball hitting the board? Give your answer in Joule

A frog is sitting on a lily pad when it sees a delicious fly. He darts out his tongue at a speed of 3.40 m/s to catch the fly. The tongue has a mass of 0.410 g, and the rest of the frog plus the lily pad have a mass of 12.5 g. What is the recoil speed of the frog and the lily pad? Ignore drag forces on the pad due to the water.

A 2.76-kg steel ball strikes a massive wall at 10.0 m/s at an angle of θ = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.176 s, what is the average force exerted by the wall on the ball?

Problem 3: Doctor Doom, who has a mass of 188kg, is charging towards the Hulk who has a mass of 636kg and is running at him with a velocity of -33.0m/s. The two of the undergo an elastic collision and Doctor Doom ends up flying away from the Hulk with a final velocity of -61.0m/s. a) What is the initial velocity of Doctor Doom and the final velocity of the Hulk? b) What is the initial kinetic energy of Doctor Doom and the Hulk before they collide?