Mass, Speed, and Kinetic Energy

Front

What two things determine the amount of energy an object has?

Back

Mass and speed.

Front

How much less kinetic energy does an object have if it changes speed from 100 km/h to 50 km/h?

Back

Kinetic energy decreases from 400 kJ to 100 kJ.

Front

When the speed of an object doubles, what happens to kinetic energy?

Back

It quadruples.

Front

Can a kinetic energy vs speed graph show a curved line?

Back

YES.

Front

Based on the kinetic energy vs mass graph, when the mass of an object doubles, what happens to kinetic energy?

Back

It doubles.

Front

What is the formula for kinetic energy?

Back

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

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.

Front

What happens to kinetic energy if the mass is halved while speed remains constant?

Back

Kinetic energy is also halved.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy increases with the square of the speed.

Front

If an object is at rest, what is its kinetic energy?

Back

The kinetic energy is 0 Joules.