Integrated science ch.4 Review

When a train increases its velocity, its momentum

• decreases

• increases

• remains unchanged

• is transferred to its surroundings

A car with a mass of 1400 kg moves along the ice with a constant velocity of 18.0 m/s. What is the car’s momentum?

• 77.8 N

• 25,200 N

• 77.8 kg x m/s

• 25,200 kg x m/s

When a bowling ball collides with a bowling pin, the momentum of the ball

• increases slightly as the velocity of the pin increases.

• decreases slightly as the velocity of the pin increases.

• decreases slightly as the velocity of the pin decreases.

• does not change at all.

If a moving boxcar gently collides with a boxcar at rest and the two boxcars move together, their combined momentum will be

• greater than the original momentum of the moving boxcar.

• equal to the original momentum of the moving boxcar.

• less than the original momentum of the moving boxcar.

• zero.

The law of conservation of momentum states that when two objects collide, their combined momentum

• increases after the collision.

• remains the same after the collision.

• decreases after the collision.

• cannot be determined after the collision.

When a moving bumper car collides with a bumper car at rest, which of the following occurs?

• Momentum is transferred to the car at rest.

• Momentum is transferred to ground beneath the cars.

• Momentum is transferred to the moving car.

• There is no transfer of momentum.

An ice skater with a mass of 65 kg moves along the ice with a constant velocity of 2.0 m/s. What is the skater’s momentum?

• 130 kg • m/s

• 32 kg • m/s

• 130 N

• 32 N

What happens when a moving bumper car hits a bumper car at rest?

• The car at rest gains momentum.

• The ground under the cars gains momentum.

• The moving car gains momentum.

• Momentum is not transferred.

What must you know to find the momentum of an object?

• mass and acceleration

• acceleration and force

• mass and velocity

• velocity and time

What is true when all objects collide?

• The velocity of each object does not change.

• The objects always stick together.

• The objects always bounce off each other.

• The total momentum does not change.