Simple Machines Unit Test Review

Which simple machine changes the direction of force needed to do a task without changing the size of the force needed?

• an inclined plane

• a screw

• a pulley

• a wedge

The back of a hammer, called the claw, can be used to pull a nail out of a board. The claw is placed around the nail, and then the handle is forced down to pull the nail out of the board. When the claw of a hammer is used to pull a nail out of a board, what kind of simple machine is it being used as?

• lever

• wheel and axle

• pulley

• screw

• inclined plane

Which of the following statements is true?

• Gravity always causes a change in motion.

• Balanced forces do not cause a change in motion.

• Balanced forces always cause a change in motion.

• Unbalanced forces do not cause a change in motion.

The picture shows a man using a rod to move a boulder. The rod is resting on a smaller stone near the boulder. The man is using the rod and stone as which kind of simple machine?

• inclined plane

• screw

• lever

• pulley

Which type of simple machine is a baseball bat?

• wedge

• lever

• pulley

• screw

Shoelaces and the holes they are threaded through are most like which kind of simple machine?

• screws

• inclined plane

• pulleys

• wheel and axle

An asteroid passes near the South Pole of the Earth. In which direction does the Earth's gravity pull the asteroid?

• →

• ↓

• ↑

• ←

Kyle and Jon are both pushing the same box. Kyle is pushing to the right. Jon is pushing to the left. The box will not move if...

• Kyle stops pushing the box, but Jon does not.

• Jon and Kyle push the box with the same amount of force.

• Jon pushes the box with more force than Kyle.

• Kyle pushes the box with more force than Jon.

Which simple machine can be described as a shaft or rod that is attached to the center of a wheel?

• wheel and axle

• lever

• pulley

• inclined plane

Caleb throws his ball up in the air, but the ball falls back to the ground. What force made the ball move without ever touching the ball?

• the air pressure pushing on the ball

• Caleb's hand pushing on the ball

• gravity pulling on the ball

• magnetism pulling on the ball