Chapter 18 Study Guide: Forces

A _______________ is a push or pull that causes change in motion.

_______________ is a force that opposes motion.

_______________ is the force of attraction that Earth exerts on an object.

A _______________ is a device made of only a few parts that makes work easier.

An _______________ is a ramp or other sloping surface.

A _______________ is a wheel with a rope that lets you change the direction in which you move an object.

A _______________ is a bar that makes it easier to move things.

A _______________ is the balance point on a lever.

In which of the following situations is work occurring?

If two arm wrestlers exert a force on each other's hands and their hands do not move, which type of force is occurring?