Conservation of Momentum

While playing pool, the white cue ball moves to the right and strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?

• 2 m/s
• 8 m/s
• -2 m/s
• 1.5 m/s

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1 m/s.  The carts stick together when they collide.  Calculate their final speed.

• 0.5 m/s
• 1.0 m/s
• 0.33 m/s
• 0.67 m/s

A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. The vehicles do not stick together. What is the velocity of the truck?

• 10 m/s
• 0 m/s
• 5 m/s
• 2 m/s

A 9 kg blob of clay moving at 5 m/s collides and sticks to a second blob of clay with a mass of 5 kg. If the two blobs stick together, what will the velocity of the two blobs move at?

• 3.57 m/s
• 3.2 m/s
• 10.0  m/s
• 9.0  m/s

Two objects of the same mass collide with each other.  The second object is at rest and the first is moving at 5 m/s North before the collision.  After the collision, the first mass is at rest and the second mass continues at 5 m/s North. 
The type of collision represented by these two masses is

• Inelastic
• Explosive
• Elastic

Both students experience the same ____

• force of impact
• time of impact
• change in momentum
• all of the above

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

Momentum is conserved in what type(s) of collision?

• elastic
• inelastic
• explosion
• elastic, inelastic and explosions

Sally runs and jumps off of a diving board and lands on a tube (she stays in the tube).  The collision between Sally and the tube is

• Elastic
• Explosion
• Inelastic
• elastic and inelastic

A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 

• 5 m/s
• 2.5 m/s
• 10 m/s
• 7.5 m/s

Tags

NGSS.HS-PS2-2

A .030 kg bullet is fired from a gun with a speed of 350 m/s. If the gun has a mass of 0.9 kg, what is the recoil speed of the gun?

• 11.7 m/s
• 9.0 m/s
• 10.5 m/s
• 10 m/s