What is a force?

Work is-

A machine is -

A slide is

A knife is -

A rope and a wheel make a

A see saw is a

This tool pushes things apart.

This tool reduces friction by making it easier for things to roll around

A gear is

An inclined plane wrapped around a post

A compound machine is

No machine is 100 percent efficient because some energy must be used to

To be considered a machine a tool must do all but one of the following:

This force makes work harder:

These only eat plants

These eat only meat:

Only these can be producers:

Producers get energy to make food from :

Which of the following is an example of a wedge?

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