Work and Energy

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 x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is Gravitational Potential Energy (GPE)?

Back

Gravitational Potential Energy is the energy an object possesses due to its position in a gravitational field. It is calculated using the formula: GPE = mass x gravity x height (GPE = mgh).

Front

What is the relationship between Work and Energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object, resulting in a change in its energy state.

Front

What must happen for work to be done on an object?

Back

A force must be exerted on the object, and the object must move in the direction of the force.

Front

How do you calculate the work done when a force is applied at an angle?

Back

Work done can be calculated using the formula: Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What happens to potential and kinetic energy in a pendulum?

Back

As a pendulum swings, its potential energy decreases while its kinetic energy increases as it moves from the highest to the lowest point.

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).

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion. It is calculated using the formula: KE = 0.5 x mass x velocity² (KE = 1/2 mv²).

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

How does mass affect Gravitational Potential Energy?

Back

Gravitational Potential Energy is directly proportional to the mass of the object; as mass increases, GPE increases if height remains constant.