Total Momentum Assessment

A 2 kg cart moving at 3 m/s collides with a stationary 1 kg cart. After the collision, the 2 kg cart moves at 1 m/s. What is the velocity of the 1 kg cart after the collision if no net external force acts on the system?

• 2 m/s

• 5 m/s

• 4 m/s

• 1 m/s

A 0.5 kg ball is rolling at 4 m/s towards a 0.5 kg ball at rest. After they collide and stick together, what is their combined velocity if no net force acts on the system?

• 2 m/s

• 4 m/s

• 0 m/s

• 1 m/s

Two ice skaters push off from each other on frictionless ice. Skater A (60 kg) moves at 2 m/s to the left. What is the velocity of Skater B (40 kg) to the right, assuming no net external force?

• 1 m/s

• 3 m/s

• 2 m/s

• 0.5 m/s

A 3 kg object moving at 2 m/s collides with a 2 kg object moving at 1 m/s in the same direction. What is the total momentum of the system before the collision?

• 8 kg·m/s

• 7 kg·m/s

• 5 kg·m/s

• 6 kg·m/s

A 5 kg object is at rest. A 2 kg object moving at 6 m/s collides with it and they stick together. What is their velocity after the collision if no net force acts on the system?

• 1.71 m/s

• 2.00 m/s

• 3.00 m/s

• 0.86 m/s

A 4 kg cart moving at 3 m/s collides with a 2 kg cart moving at 1 m/s in the opposite direction. What is the total momentum of the system before the collision?

• 10 kg·m/s

• 12 kg·m/s

• 8 kg·m/s

• 6 kg·m/s

If the net force on a system is zero, what happens to the total momentum of the system?

• It increases

• It decreases

• It remains constant

• It becomes zero

A 1 kg ball moving at 5 m/s collides with a 2 kg ball at rest. After the collision, the 1 kg ball moves at 2 m/s. What is the velocity of the 2 kg ball if momentum is conserved?

• 1.5 m/s

• 2.5 m/s

• 3.0 m/s

• 1.0 m/s

A 10 kg object moving at 2 m/s collides with a 5 kg object moving at 4 m/s in the same direction. What is the total momentum before the collision?

• 40 kg·m/s

• 30 kg·m/s

• 20 kg·m/s

• 50 kg·m/s

A 2 kg object moving at 3 m/s to the right collides with a 2 kg object moving at 3 m/s to the left. What is the total momentum of the system before the collision?

• 12 kg·m/s

• 0 kg·m/s

• 6 kg·m/s

• 3 kg·m/s