Energy and Work

Front

What is energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, including kinetic, potential, thermal, and more.

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

What unit is work measured in?

Back

Work is measured in joules (J).

Front

What is kinetic energy?

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?

Back

Potential energy is the energy stored in an object due to its position or state, such as gravitational potential energy, which depends on height.

Front

What is the law of conservation of energy?

Back

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

Front

How is gravitational potential energy calculated?

Back

Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What are the two main categories of energy?

Back

The two main categories of energy are kinetic energy and potential energy.

Front

What happens to energy during a collision?

Back

During a collision, energy can be transferred from one object to another, but the total energy in a closed system remains constant.

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.