Simple Machines, Work, and Mechanical Advantage

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, and inclined planes.

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force (Work = Force x Distance).

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. It indicates how much a machine multiplies force.

Front

How does a machine affect the amount of work done?

Back

A machine does not change the total amount of work done; it only changes the way work is applied or the force needed to do the work.

Front

What is the formula for calculating mechanical advantage in levers?

Back

Mechanical Advantage = Length of Effort Arm / Length of Resistance Arm.

Front

If a crowbar is 40 cm long and 10 cm is used to lift, what is the mechanical advantage?

Back

Mechanical Advantage = 40 cm / 10 cm = 4.

Front

What is the mechanical advantage of a ramp that is 10 m long and 2 m high?

Back

Mechanical Advantage = Length of Ramp / Height of Ramp = 10 m / 2 m = 5.

Front

How do you calculate work done when pushing an object?

Back

Work = Force x Distance. For example, pushing a cart with 60 N for 2 m results in 120 J of work.

Front

Which of the following is an example of doing work?

Back

Picking up a pencil is doing work because a force is applied to move the pencil.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J). One Joule is equal to one Newton meter.