Energy Review

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position or height in a gravitational field.

Front

What factors affect gravitational potential energy?

Back

Gravitational potential energy depends on the mass of the object and its height above a reference point.

Front

How is gravitational potential energy calculated?

Back

Gravitational potential energy (PE) is calculated using the formula: PE = mass (m) × gravitational acceleration (g) × height (h).

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy (KE) is: KE = 1/2 × mass (m) × velocity (v)².

Front

What factors affect kinetic energy?

Back

Kinetic energy depends on the mass of the object and the square of its velocity.

Front

If the mass of an object doubles, how does its kinetic energy change if velocity remains constant?

Back

If the mass doubles and velocity remains constant, the kinetic energy also doubles.

Front

If the velocity of an object doubles, how does its kinetic energy change?

Back

If the velocity doubles, the kinetic energy increases by a factor of four (quadruples).

Front

What is the gravitational potential energy of a 50 N object at a height of 4 m?

Back

PE = 50 N × 4 m = 200 J.

Front

What is the kinetic energy of a 10 kg object moving at 5 m/s?

Back

KE = 1/2 × 10 kg × (5 m/s)² = 125 J.

Front

What happens to gravitational potential energy when an object is dropped?

Back

When an object is dropped, its gravitational potential energy decreases as it falls, converting to kinetic energy.