Summer School Physical Science - CH 5 - Section III Quiz

A slanted surface used to raise an object is a(n)

• inclined plane

• screw

• effort ramp

• efficiency board

A bar that is free to pivot about a fixed point is a

• lever

• wedge

• fulcrum

• ramp

The rate at which work is done is

• efficiency

• effort time

• power

• force

Two inclined planes put together form a simple machine called a(n) ___________.

• screw

• effort arm

• lever

• wedge

An inclined plane wrapped around a cylindrical post is a __________.

• wedge

• screw

• block and tackle

• lever

A winding mountain road is an example of what kind of simple machine?

• a lever

• an inclined plane

• a wheel and axle

• a pulley

What are two or more simple machines that work together called?

• compound machine

• pulley

• lever

• wheel and axle

A lever with a mechanical advantage greater than one is used to ____________.

• increase distance

• change direction

• increase force

• increase speed

Three of the following simple machines are basically the same. Choose the one that DOES NOT belong with the group.

• pulley

• wedge

• lever

• wheel and axle

A system of pulleys designed to multiply the effort force is called a ___________.

• simple pulley

• fixed pulley

• movable pulley

• block and tackle