A 0.145- kg baseball with an initial speed of 23 m/s rebounds with a speed of 36 m/s after being struck with a bat. If the duration of contact between ball and bat was 2.8 ms, what was the magnitude of the average force between ball and bat?

A 50.0 kg penguin is skiing, her velocity is facing north at 5.0 m/s.  She runs into a 28.0 kg sea lion. After they are moving together at (velocity) of 2.0 m/s with an angle of 40 degrees north of east. Find the magnitude of the sea lions velocity before the accident?

A tabletop gamer has designed a game that requires three dice to be thrown onto a tray with a measurement grid. To add an extra degree of randomness, the coordinates of the center of mass of the three dice are used as well. The masses of the three dice are 11.10 g, 13.70 g, and 17.30 g, and their respective coordinates after one particular throw are (0.2810 m,−0.2330 m), (−0.1910 m,0.2890 m), and (−0.4790 m,−0.2210 m). What are the resulting coordinates of the center of mass of the dice, xcm and ycm? xcm = ? m ycm = ? m

A 142g baseball is moving at 17.0 m / s in the + x direction. When hit with a bat by a baseball player, its final velocity is 21.0 m / s in the -x direction. The bat acts on the ball for 6.0 x 10⁻² s. What is the magnitude of the average force exerted by the bat on the ball?

A golf club strikes a golf ball. The club and the ball remain in contact for 0.6ms. The 35gram ball leaves the club with a speed of 60m/s. Calculate the average force of the club to the ball.

A 4.10-kg steel ball strikes a wall with a speed of 11.0 m/s at an angle of ? = 60.0° with the surface. It bounces off with the same speed and angle (see figure below). If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right and up are the positive directions.) Fx =   Fy =

As part of a safety investigation, two 1900 kgkg cars traveling at 21 m/sm/s are crashed into different barriers.  Find the average force exerted on the car that hits a line of water barrels and takes 1.4 ss to stop. Find the average force exerted on the car that hits a concrete barrier and takes 0.20 ss to stop.

A 38.0-kg boy, riding a 1.90-kg skateboard at a velocity of 5.60 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.60° above the horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Be sure to include the correct algebraic sign with your answer.

You are playing volleyball. Your hand was in contact with the ball for 3milliseconds during the rally. The 1000gram ball leaves your hand with a speed 2.4m/s. Calculate the average force of you exerted on the volleyball.

A drunk driver in a 2100 kgkg car plows into a 2000 kgkg parked car with its brake set. Police measurements show that the two cars skid together a distance of 21 mm before stopping. If the effective coefficient of friction is 0.74, how fast was the drunk going just before the collision?