Kinetic and Potential Energy Problems

Front

What is Kinetic Energy?

Back

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

Front

How do you calculate the mass of an object using its kinetic energy?

Back

Rearranging the kinetic energy formula KE = 1/2 mv² gives mass m = 2KE/v².

Front

What is the formula for Gravitational Potential Energy?

Back

The formula for Gravitational Potential Energy is PE = mgh, where m is mass, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height.

Front

If a bowling ball has a kinetic energy of 16J and is traveling at 4.0 m/s, what is its mass?

Back

The mass of the bowling ball is 2kg.

Front

Calculate the gravitational potential energy of a 0.88kg bird flying at an altitude of 550m.

Back

The gravitational potential energy is 4.74 x 10^3 J.

Front

What is the gravitational potential energy of 1m of water weighing 6.3 x 10^15 N held 250m above the river?

Back

The gravitational potential energy is 1.58 x 10^15 J.

Front

How do you find the height of an object using its gravitational potential energy?

Back

Rearranging the potential energy formula PE = mgh gives height h = PE/(mg).

Front

Calculate the gravitational potential energy of a car with a mass of 1300kg at the top of a 52m high hill.

Back

The gravitational potential energy is 6.62 x 10^5 J.

Front

If a 55g egg has 8.0J of gravitational potential energy, how far is the student's arm from the ground?

Back

The height is 15m.