Energy 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 energy stored in an object due to its position or state. For example, an object at a height has gravitational potential energy.

Front

What two factors affect an object's kinetic energy?

Back

Mass and speed.

Front

How does speed affect kinetic energy?

Back

The faster an object moves, the more kinetic energy it has.

Front

What happens to kinetic energy as an object's velocity decreases?

Back

As the velocity of an object decreases, its kinetic energy decreases.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) = 1/2 * mass (m) * speed (v)².

Front

What is the formula for calculating potential energy?

Back

Potential energy (PE) = mass (m) * gravity (g) * height (h).

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

Front

Where would a tossed baseball have the least amount of kinetic energy?

Back

At the highest point of its trajectory, where its speed is lowest.

Front

If an object has a mass of 2 kg and is moving at a speed of 3 m/s, what is its kinetic energy?

Back

Kinetic energy = 1/2 * 2 kg * (3 m/s)² = 9 Joules.