Physics Quiz on Motion and Energy

A projectile launched horizontally from a cliff will land at a different time than a rock simply dropped from the same height because of its horizontal speed.

• True

• False

When a lighter object and a heavier object experience the same impulse, the heavier object will have a greater change in velocity.

• True

• False

In a collision between two ice skaters pushing away from each other, the total momentum after pushing apart depends on their individual masses and direction.

• True

• False

Increasing the time of contact between a baseball bat and the ball can decrease the force acting on the ball during the collision.

• True

• False

In a vacuum, if a feather and a metal ball are dropped from the same height, both objects will hit the ground at the different time.

• True

• False

A car moving in a circular track at constant speed will not accelerate because its speed is unchanging.

• True

• False

When two vehicles with different masses collide and stick together, their final velocity depends on their combined momentum, not simply their average speed.

• True

• False

Wearing seatbelts and airbags in a car is an example of increasing the time of impact to reduce injuries from force.

• True

• False

If a motorcycle and a truck travel at the same velocity, the motorcycle will always have more momentum because greater mass.

• True

• False

A faster-moving truck may not always have more momentum than a slower car, regardless of their masses.

• True

• False