Work and Power Concepts

Front

The work that comes OUT of a machine is called...

Back

output

Front

The work that goes INTO a machine is called...

Back

input

Front

What is the ideal mechanical advantage of a lever with an input arm of 4 meters and an output arm of 0.8 meters?

Back

5

Front

If 360 J of work is needed to move a crate a distance of 4 m, what is the weight (force) of the crate?

Back

90 N

Front

What is the AMA of a lever if a force of 50 N is applied to lift a rock that weighs 350 N?

Back

7

Front

Define 'work' in physics.

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

Front

What is 'power' in the context of work?

Back

Power is the rate at which work is done, calculated as Power = Work / Time.

Front

What is the formula for calculating mechanical advantage?

Back

Mechanical Advantage = Output Force / Input Force.

Front

Explain the difference between input and output work.

Back

Input work is the work done on a machine, while output work is the work done by the machine.

Front

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

Back

The unit of work is the Joule (J).