Ball C has a mass of 0.5 Kg. Ball D has a mass of 1.0 Kg. Ball C is moving at 6.0 m/s and collides head on with Ball D that is moving in the opposite direction at 12 m/s. BallC bounces back at 14 m/s after the collision. What is the velocity of ball D after the collision?

A 5-kg object moving with a velocity of 8 m/s in the positive x direction strikes and sticks to a 3-kg object moving with a speed of 3 m/s in the opposite direction. What is their speed after the collision?

A 49 kg boy on roller skates moves with a speed of 4 m/s. He runs into a 41 kg girl on skates. Assuming they cling together after the collision, what is their speed (in m/s)? (Assume the girl is initially at rest.) m/s

A 7.6 kg block with a speed of 3.9 m/s collides with a 15.2 kg block that has a speed of 2.6 m/s in the same direction. After the collision, the 15.2 kg block is observed to be traveling in the original direction with a speed of 3.3 m/s. (a) What is the velocity of the 7.6 kg block immediately after the collision? (b) By how much does the total kinetic energy of the system of two blocks change because of the collision? (c) Suppose, instead, that the 15.2 kg block ends up with a speed of 5.2 m/s. What then is the change in the total kinetic energy?

A 17.8 kg sled is sitting at rest on level ice, and this sled is hit by another sled that is twice as massive. After the collision, the sleds stick together and move off at 6.3 m/s. How fast was the larger sled initially moving just before the collision?

At the local radio controlled (RC) airfield, a 2.4 kg RC plane strikes a 1.2 kg aerial drone that is hovering stationary at an altitude of 9.6 m.  Just after the collision, the two aircraft are stuck together and moving to the east at 9 m/s at an altitude of 9.6 m. What is the speed (in m/s) of the plane just prior to the collision?

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A hungry 6.61 kg fish swimming at 2.37 m/s swallows a 0.69 kg fish that was swimming towards it at 2.72 m/s. What is the final speed (in m/s) of the formerly hungry fish?

A 20 gram ball with the speed of 25 cm/s is moving to the right makes an elastic head– on collision with a 40 g ball moving to the left at 0.15 m/s. After the collision the ball with less mass moves to the left at 16 m/s. What is the velocity of the 2nd ball after the collision?

An object with a mass of 8.00 g is moving to the right at 14.0 cm/s when it is overtaken by an object with a mass of 25.0 g moving in the same direction with a speed of 17.0 cm/s. If the collision is elastic, determine the speed of each object after the collision in centimeters per second. 25.0 g object_______________ cm/s   8.00 g object _______________ cm/s