Work and Power Review

Front

What is Work?

Back

Work is defined as the transfer of energy that occurs when a force moves an object over a distance. It is calculated as Work = Force x Distance.

Front

What is Power?

Back

Power is the amount of work done over a certain amount of time. It is calculated as Power = Work / Time.

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is Potential Energy?

Back

Potential Energy is the stored energy of an object due to its position or state, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate Work done against gravity?

Back

Work done against gravity can be calculated using the formula Work = mgh, where m is mass, g is the acceleration due to gravity (9.81 m/s²), and h is the height.

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What is the relationship between Work and Energy?

Back

Work and energy are closely related; work done on an object results in a change in its energy. Energy can be transformed from one form to another.

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J), which is equivalent to one Newton meter (N·m).

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What is the unit of Power?

Back

The unit of Power is the Watt (W), which is equivalent to one Joule per second (J/s).

Front

How do you calculate Power when Work and Time are known?

Back

Power can be calculated using the formula Power = Work / Time.

Front

What is the formula for calculating Kinetic Energy?

Back

The formula for calculating Kinetic Energy is KE = 1/2 mv².