Question

A 5 kg ball is traveling to the right at a speed of 12 m/s.  A 2 kg ball is traveling to the left at 30 m/s.  They collide in an inelastic collision.  

What is their final speed?

		0 m/s
		12 m/s
		17 m/s
		30 m/s
		42 m/s

A 2000 kg truck drives the right at a speed of 40 m/s. How many 0.25 kg bullets fired at 350 m/s need to be fired at the front of the truck to stop it if every bullet collides inelastically with the truck?

		105  bullets
		426  bullets
		915 bullets
		8000  bullets
		334 bullets

A 5 kg ball travels to the right at a speed of 2 m/s. It then strikes a stationary 20 kg ball. If the 5 kg ball bounces back and returns to the left at a speed of 0.4 m/s, how much energy was lost in this collision?

		0 J
		2 J
		4 J
		6 J
		8 J
		10 J

A 5 kg ball travels to the right at a speed of 2 m/s. It then strikes a stationary 20 kg ball. If the 5 kg ball bounces back and returns to the left at a speed of 0.4 m/s, how fast will the 20 kg ball be moving after this collision?

		0.0 m/s
		0.1 m/s
		0.2 m/s
		0.4 m/s
		0.6 m/s
		0.8 m/s

Ignore air resistance for the following problem.

A .75 kg ball is dropped from a height of 10 m. It strikes the ground and bounces back upward to a height of 8.25 m.

While we cannot know what type of collision this is, as we do not know how much the earth's motion changed, we do know what type of collision this is NOT. What type of collision do we know this is NOT?

		inelastic collision
		perfectly elastic collision
		terrestrial collision
		bouncy collision

Ignore air resistance for the following problem.

A .75 kg ball is dropped from a height of 10 m. It strikes the ground and bounces back upward to a height of 8.25 m.

What is the magnitude of the change in momentum the ball experiences in this collision with the ground?

		12.72 kg m/s
		9.54 kg m/s
		14.00 kg m/s
		0.96 kg m/s
		10.50 kg m/s
		20.04 kg m/s

Answer 1

Answer