PRACTICE: KE & PE 2024

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion. It depends on the mass of the object and the square of its velocity.

Front

What is Potential Energy (PE)?

Back

Potential Energy is the stored energy in an object due to its position or state. It is often associated with the height of an object above the ground.

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 the acceleration due to gravity, and h is height.

Front

How does height affect Potential Energy?

Back

The higher an object is, the more Potential Energy it has, as it is positioned to do more work when it falls.

Front

What happens to the energy of a ball when it is dropped from a height?

Back

As the ball falls, its Potential Energy is converted into Kinetic Energy until it reaches the ground.

Front

What is the relationship between mass and Kinetic Energy?

Back

Kinetic Energy increases with an increase in mass; a heavier object moving at the same speed has more KE.

Front

What is the relationship between velocity and Kinetic Energy?

Back

Kinetic Energy increases with the square of the velocity; if the speed doubles, the KE increases by four times.

Front

What is the effect of friction on energy?

Back

Friction converts some of the mechanical energy into thermal energy, causing a loss of total mechanical energy.

Front

Can an object have both Kinetic and Potential Energy at the same time?

Back

Yes, an object can have both types of energy, such as a plane flying at a height (PE) while moving (KE).