Collisions

A 2800 kg truck moving at 19 m/s collides with a stationary 1000 kg passenger car, and the two stick together.  Assuming that they are free to move afterward, what is the momentum of the truck + car object after the collision?

• 14,000 kg*m/s
• 14 kg*m/s
• 72,000 kg*m/s
• 53,000 kg*m/s

Tags

NGSS.HS-PS2-2

A model rocket with an initial mass of 4.0 kg is launched horizontally by burning and expelling 530 g of fuel with a velocity of 100 m/s.  What is the velocity of the rocket after the fuel is expelled?  (Assume the propellant is expelled instantaneously.)

• 15 m/s
• 0.65 m/s
• 13 m/s
• 66 m/s

Tags

NGSS.HS-PS2-2

Ball A has a mass of 8.0 kg.  Ball B has twice the mass of ball A.  The two balls collide and stick together in a perfectly inelastic  collision.  After the collision the combined balls are at rest.  If the velocity of ball A before the collision was 7.3 m/s , what was the velocity of ball B before the collision?

• 3.6 m/s
• -7.3 m/s
• 15 m/s
• -3.6 m/s

Tags

NGSS.HS-PS2-2

A 1300 kg car sliding on frictionless ice at 25 m/s hits a stationary 2400 kg minivan.  The two vehicles are locked together after impact on the ice.  What is their speed after impact?

• 0.0 m/s
• 8.8 m/s 
• 25 m/s
• 14 m/s

Tags

NGSS.HS-PS2-2

While playing pool, the white cue ball 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

Tags

NGSS.HS-PS2-2

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 -1m/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

Tags

NGSS.HS-PS2-2

Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:

• 2 m/s 
• 3.4 m/s 
• 4.6 m/s 
• 7.1 m/s

Tags

NGSS.HS-PS2-2

A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg,  collides with a smaller box with a mass of 2 kg that is stationary.  The boxes stick together. What is the velocity of the two combined masses after collision?

• 0 m/s
• 4 m/s
• 8 m/s
• 12 m/s

Tags

NGSS.HS-PS2-2

A 120 kg lineman moving at -2 m/s tackles an 80 kg fullback moving at +8 m/s. If the fullback's velocity after they collide is +2 m/s, what is the lineman's velocity?

• 2 m/s
• 8.7 m/s
• 4.7 m/s
• 6 m/s

Tags

NGSS.HS-PS2-2

A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. What is the velocity of the truck?

• 10 m/s
• 0 m/s
• 5 m/s
• 2 m/s

Tags

NGSS.HS-PS2-2