With a second class lever, such as a wheelbarrow, in which direction is the input force?

When replacing a light bulb in a lamp, how much force is applied over the distance?

How is mechanical efficiency determined?

Which of the following is a first class lever?

Which is a third class lever?

How are the forces compared in the use of a crowbar?

When a machine changes a force's size, what also changes?

What does a single pulley change on an object?

How can you increase the amount of work done?

A machine's mechanical advantage tells you

The Law of Conservation of Energy explains the

What is the purpose of a machine?

What decreases a machine's efficiency?

How is a machine's efficiency shown?

If you push a 20N chair across a floor for 15 meters, how much work is done?

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