Energy- Physics

Front

What is 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 gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh (mass x gravity x height).

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv² (1/2 x mass x velocity squared).

Front

What is the formula for calculating work?

Back

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 energy as an object falls?

Back

As an object falls, its gravitational potential energy decreases while its kinetic energy increases, conserving total mechanical energy.

Front

What is the unit of work?

Back

The unit of work is the Joule (J).

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.

Front

At which position does a pendulum have maximum kinetic energy?

Back

A pendulum has maximum kinetic energy at the lowest point of its swing.

Front

What is the significance of the angle in the work formula?

Back

The angle θ in the work formula determines how much of the force contributes to the work done in the direction of motion.

Front

How does mass affect gravitational potential energy?

Back

Gravitational potential energy increases with mass; doubling the mass of an object doubles its potential energy at a given height.