Force and Motion + Kinetic and Potential Energy

Front

Penny has two dogs, Fluffy and Butch, and two identical wagons. She puts one dog in each wagon and pushes each with the same force. How does the motion of the wagons compare?

Back

Fluffy's wagon will move faster.

Front

Which of the following statements is true?

• Balanced forces do not cause a change in motion.
• Unbalanced forces do not cause a change in motion.
• Gravity always causes a change in motion.
• Balanced forces always cause a change in motion.

Back

Balanced forces do not cause a change in motion.

Front

What can James do to increase the amount of friction on the floor and decrease his chance of slipping? Options: put a thin coat of oil on the floor, polish the floor to make it smooth, clean the floor thoroughly every day, add a bumpy surface to the floor.

Back

add a bumpy surface to the floor

Front

Which of the following statements is true?

• An object moving in a straight line will eventually change direction on its own.
• Moving objects stay in motion until acted on by another force.
• Objects at rest eventually begin to move.
• Moving objects will eventually stop moving on their own.

Back

Moving objects stay in motion until acted on by another force.

Front

What caused the ball to move away from Carrie while playing catch?

Back

the balanced force of wind

Front

Use of friction in the transportation industry:

• Car towing a trailer accelerates, trailer accelerates at the same rate.
• Ship launched out to sea, downward force balanced by water's upward force.
• Locomotive's brakes applied, force between brakes and wheels slows locomotive.
• Passenger jet burns fuel, shoots exhaust, jet moves forward.

Back

Locomotive's brakes applied, force between brakes and wheels slows locomotive.

Front

An unbalanced force caused a cup to start sliding across a table. Which is an example of such a force?

Back

someone pushing the cup

Front

How will the motion of the truck most likely change when it rolls onto the carpet?

Back

The truck will slow down more quickly.

Front

Marc and Rick are pushing on opposite sides of a box. Marc pushes with a force of 5 N. Rick also pushes with a force of 5 N. In what direction will the box move?

Back

The box will not move because the forces are balanced.

Front

Dedra drops a metal ball onto different parts of a large piece of soft clay from three different heights and measures the depth of each dent. Which statement is supported by this investigation? Options: The ball's mass affects the force of the ball hitting the clay. The drop height affects the force of the ball hitting the clay. The shape of the clay affects the mass of the ball. The type of clay affects the depth of the dent.

Back

The drop height affects the force of the ball hitting the clay.