Conservation of momentum TEST

A(n) _________________ causes and is equal to a change in momentum

• impulse

• force

• impact

• collision

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

Tags

NGSS.HS-PS2-2

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ________kgm²/s².

• 18

• -10

• -18

• -45

• Not enough information

Tags

NGSS.HS-PS2-1

Which has more momentum: a car at a stop light or a bike moving at 15 mph?

• car
• bike
• they are equal
• cannot determine using the info provided

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

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

Two moving objects collide and move on paths that are 120 degrees apart. The total momentum of the objects after the collisions is ____ the total momentum before the collision

• equal to
• greater than
• less than

Tags

NGSS.HS-PS2-2

What impulse is needed to stop a 45 g mass traveling at a velocity of -42 m/s?

• 19 kg m/s
• 1900 N s
• 1.9 N s
• 19 N s

Tags

NGSS.HS-PS2-1

A 400 kg cannon fires a 10 kg cannonball at 20 m/sec. If the cannon is on wheels, at what velocity does it move backward?

• 8 kg

• 7 m/s

• 2 m/s

• 0.5 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

"Big" Al stands on a skateboard at rest and throws a 0.5 kg rock at a velocity of 10 m/s. "Big" Al moves back at 0.05 m/s. What is the combined mass of "Big" Al and the skateboard.

• 100.5 kg

• 100 kg

• 20.5 kg

• 85 kg

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2