Conservation of Energy

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

Define Kinetic Energy (KE).

Back

Kinetic Energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

Define Potential Energy (PE).

Back

Potential Energy is the energy stored in an object due to its position or configuration, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What happens to Kinetic Energy at the highest point of a projectile's motion?

Back

At the highest point, the Kinetic Energy is zero because the object momentarily stops before descending.

Front

How does mass affect Kinetic Energy?

Back

Kinetic Energy is directly proportional to mass; if mass increases, Kinetic Energy increases, assuming velocity remains constant.

Front

How does velocity affect Kinetic Energy?

Back

Kinetic Energy is proportional to the square of velocity; if velocity doubles, Kinetic Energy increases by a factor of four.

Front

What is the relationship between Kinetic Energy and Potential Energy in a rollercoaster?

Back

In a rollercoaster, Kinetic Energy and Potential Energy convert into each other; as the coaster ascends, KE decreases and PE increases, and vice versa.

Front

At which point in a rollercoaster is Kinetic Energy the greatest?

Back

Kinetic Energy is greatest at the lowest point of the rollercoaster, where the speed is highest.

Front

If a ball is thrown upwards with 250 J of Kinetic Energy, how high will it go?

Back

The ball will reach a height of 51 m when all Kinetic Energy is converted to Potential Energy.

Front

When velocity triples, how many times does Kinetic Energy increase?

Back

When velocity triples, Kinetic Energy increases by 9 times.