F2017: Unit 4 Collisions

Which is true about the total momentum during an elastic collision?

• Momentum is conserved.  No external momentum is gained.  No momentum is lost.
• The total momentum before the collision is greater than the total momentum after the collision.
• The total momentum after the collision is greater than the total momentum before the collision.
• The total momentum before the collision is zero.  The total momentum after the collision is zero.

Which is true about the total momentum during an inelastic collision?

• Momentum is conserved.  No external momentum is gained.  No momentum is lost.
• The total momentum before the collision is greater than the total momentum after the collision.
• The total momentum after the collision is greater than the total momentum before the collision.
• The total momentum before the collision is zero.  The total momentum after the collision is zero.

Which is true about the total kinetic energy during an elastic collision?

• KE is conserved.  No external KE is gained.  No KE is lost.
• The total KE before the collision is greater than the total KE after the collision.
• The total KE after the collision is greater than the total KE before the collision.
• The total KE before the collision is zero.  The total KE after the collision is zero.

Which is true about the total kinetic energy during an inelastic collision?

• KE is conserved.  No external KE is gained.  No KE is lost.
• The total KE before the collision is greater than the total KE after the collision.
• The total KE after the collision is greater than the total KE before the collision.
• The total KE before the collision is zero.  The total KE after the collision is zero.

Object 1 and Object 2 will have an elastic collision.  Which option is the best to describe the outcome of the collision?

• Object 1 will transfer momentum to Object 2.
• Object 2 will transfer momentum to Object 1.
• Object 1 will exchange momentum and velocity with Object 2.
• Object 1 and Object 2 will both come to a stop.

Object 1 and Object 2 will have an elastic collision.  Which option is the best to describe the outcome of the collision?

• Object 1 will move slower than 5.0 m/s after the collision.
• Object 1 will move faster than 5.0 m/s after the collision.
• Object 2 will move faster than -3.0 m/s after the collision.
• Object 2 will move faster than 5.0 m/s after the collision.

Object 1 and Object 2 will have an elastic collision.  What is the total momentum of the system before the collision?

• 10 kg⋅m/s
• -10 kg⋅m/s
• 0.0 kg⋅m/s
• -110 kg⋅m/s

Object 1 and Object 2 will have an inelastic collision.  They will conjoin.  Which option is the best to describe the outcome of the collision?

• Object 1-2 will be motionless after the collision.
• Object 1-2 will move to the left after the collision.
• Object 1-2 will move to the right after the collision.
• Object 1-2 will break apart and move apart after the collision.

Object 1 and Object 2 will have an inelastic collision.  They will conjoin.  Which option is the best to describe the outcome of the collision?

• Object 1-2 will move with a velocity faster than 5.0 m/s.
• Object 1-2 will move with a velocity between 5.0 m/s and -3.0 m/s.
• Object 1-2 will move with a velocity faster than -3.0 m/s.
• Object 1-2 will be motionless after the collision, velocity of 0.0 m/s.

Object 1 and Object 2 will have an inelastic collision.  They will conjoin.  What is the total momentum before the collision?

• 10 kg⋅m/s
• -10 kg⋅m/s
• -110 kg⋅m/s
• 110 kg⋅m/s