Momentum and Collisions

A block of mass m=8.5kg, moving on a frictionless surface with a speed vi=6.6m/s, makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 8.5 block recoils with a speed of vf=0.5m/s. In the figure, the mass M is closest to:

• 9.1kg

• 7.1kg

• 8.5kg

• 120kg

• 9.9kg

A block of mass m=25kg has a speed V and is behind a block of mass M = 82kg that has a speed of 0.5m/s. The surface is frictionless. The blocks collide and couple. After the collision, the blocks have a common speed of 0.9m/s. In the figure, the loss of the kinetic energy of the blocks due to the collision is closest to:

• 7.7J

• 13J

• 28J

• 33J

• 94J

In the figure, determine the character of the collision. the masses of the blocks, and the velocities before and after are given. The collision is:

• characterized by an increase in kinetic energy

• perfectly elastic

• partially inelastic

• completely inelastic

• not possible because momentum is not conserved

In the figure, determine the character of the collision. the masses of the blocks, and the velocities before and after are given. The collision is:

• partially inelastic

• perfectly elastic

• characterized by an increase in kinetic energy

• completely inelastic

• not possible because momentum is not conserved

In the figure, determine the character of the collision. The masses of the blocks, and the velocities before and after are given. The collision is:

• characterized by an increase in kinetic energy

• completely inelastic

• perfectly elastic

• partially inelastic

• not possible because momentum is not conserved

In the figure, determine the character of the collision. The masses of the blocks, and the velocities before and after are given. The collision is:

• partially inelastic

• completely inelastic

• characterized by an increase in kinetic energy

• perfectly elastic

• not possible because momentum is not conserved