PS A Unit Four Review 2020

Front

How can a machine make work easier for you?

Back

A machine can make work easier by increasing the distance, increasing the force, or changing the direction of your force. All of these choices are correct.

Front

What simple machines make up a wheelbarrow?

Back

A wheelbarrow is made up of a wheel and axle, an inclined plane, and a lever. All of these choices are correct.

Front

Identify the class of this lever: 1st Class, 2nd Class, or 3rd Class?

Back

This lever is a 1st Class Lever.

Front

Work is the product of the _________ exerted on an object and the distance the object moves in the __________ of the force.

Back

Work is the product of the force exerted on an object and the distance the object moves in the direction of the force.

Front

The mechanical advantage of a pulley system is equal to what?

Back

The mechanical advantage of a pulley system is equal to the number of rope segments supporting the load.

Front

Define 'mechanical advantage'.

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it.

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

Front

What are the three classes of levers?

Back

The three classes of levers are: 1st Class Lever, 2nd Class Lever, and 3rd Class Lever.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to help lift objects more easily.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.