A ____________ is a push or pull that causes an object to change its motion.

____________ occurs when two objects rub against each other.

_____________ is the tendency of an object to keep moving or stay at rest.

Energy is the ability to do ________.

A ball held at the top of a slide has ________________.

A wind up toy uses ________________ energy.

A toy that uses a battery has __________ energy.

When you kick a soccer ball it has __________ energy.

A motorcycle is an example of a ____________ machine.

A ______________ machine is made of one or two parts.

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