Energy, Forces and Motion

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass of the object and the speed at which it is moving.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a ball held at a height has gravitational potential energy.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object. It represents the total energy of an object in motion or at rest.

Front

At which point in a pendulum's swing is kinetic energy greatest?

Back

Kinetic energy is greatest at the lowest point of the swing, where the pendulum is moving fastest.

Front

Where is potential energy greatest in a pendulum's swing?

Back

Potential energy is greatest at the highest points of the swing, where the pendulum is momentarily at rest.

Front

What happens to kinetic energy as an object rises?

Back

As an object rises, its kinetic energy decreases while its potential energy increases, assuming no energy is lost to friction.

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

What is the relationship between work and energy?

Back

Work is done when energy is transferred from one object to another. The amount of work done is equal to the change in energy.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It converts kinetic energy into thermal energy, often causing a loss of energy.

Front

How does speed affect kinetic energy?

Back

Kinetic energy increases with the square of the speed. If the speed doubles, the kinetic energy increases by four times.