Kinetic and Potential Energy

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy an object possesses due to its motion. It is 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 stored energy in an object due to its position or state. It is commonly associated with gravitational potential energy, calculated using the formula PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the formula for calculating Kinetic Energy?

Back

KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for calculating Potential Energy?

Back

PE = mgh, where m is mass, g is acceleration due to gravity (approximately 9.81 m/s²), and h is height.

Front

If a 3 kg ball is on the ground, what is its Potential Energy?

Back

0 J (zero joules) because it is at ground level.

Front

At which point does a diver have the greatest Kinetic Energy during a dive?

Back

At the lowest point of the dive, where the diver has the least Potential Energy.

Front

Calculate the Kinetic Energy of a 0.1 kg toy car moving at 3 m/s.

Back

0.45 J (using KE = 1/2 mv²: KE = 1/2 * 0.1 kg * (3 m/s)² = 0.45 J).

Front

What is the Potential Energy of a 0.1 kg toy car at a height of 1 m?

Back

0.98 J (using PE = mgh: PE = 0.1 kg * 9.81 m/s² * 1 m = 0.98 J).

Front

What is the Potential Energy of a 2 kg plant on a windowsill 1.3 m high?

Back

25.5 J (using PE = mgh: PE = 2 kg * 9.81 m/s² * 1.3 m = 25.5 J).

Front

What happens to Potential Energy as an object falls?

Back

As an object falls, its Potential Energy decreases while its Kinetic Energy increases.