Science Test 3/12

What is one or more inclined planes used to force materials apart?

What is a flat, slanted surface?

What is a wheel with a groove that holds a rope?

What is a wheel with a rod running through it?

What is an inclined plane wrapped around a cylinder?

Suppose you lift a box onto a shelf without using a pulley. What is the direction of your effort? What is the direction of the load?

• Up, Up

• Down, Up

• Down, Down

• Up, Down

Suppose you lift another box, but this time you use a fixed pulley. What is the direction of your effort? What is the direction of the load?

• Up, Up

• Down, Up

• Down, Down

• Up, Down

The axle in a wheel and axle turns with greater force than the wheel does, and the axle moves a greater distance.

• True

• False

A fixed pulley changes the direction of the force needed to lift a load.

• True

• False

A doorknob is an example of a pulley.

• True

• False