Work energy power

Front

What is Work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied in the direction of the force. It is calculated using the formula: Work = Force x Distance.

Front

What is the unit of Work?

Back

The unit of Work is the Joule (J), which is defined as one Newton meter (1 J = 1 N·m).

Front

What is the Work-Energy Principle?

Back

The Work-Energy Principle states that the work done on an object is equal to the change in its kinetic energy.

Front

What is Kinetic Energy (KE)?

Back

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

Front

What is Potential Energy (PE)?

Back

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

Front

What does the Law of Conservation of Energy state?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another, and the total energy in a closed system remains constant.

Front

When is work done on an object?

Back

Work is done on an object when a force causes the object to move in the direction of the force applied.

Front

In which situation is no work done?

Back

No work is done when the force applied is perpendicular to the direction of motion, such as carrying an object horizontally while walking.

Front

How do you calculate the work done when lifting an object?

Back

Work done (W) when lifting an object is calculated using the formula: W = Force x Distance, where Force is equal to the weight of the object (mg).

Front

What is the relationship between Work, Kinetic Energy, and Potential Energy?

Back

The total mechanical energy of an object is the sum of its Kinetic Energy (KE) and Potential Energy (PE). This can be expressed as: Total Energy = KE + PE.