Calculating Kinetic Energy

The energy of motion is called:

• Friction

• Kinetic energy

• Potential energy

• Gravitational energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

An object that is not moving has no kinetic energy.

• True

• False

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NGSS.HS-PS3-2

As mass increases...

• Kinetic energy increases linearly

• Kinetic energy decreases linearly

• Kinetic energy increases by the square of the mass

• Kinetic energy decreases by the square of the mass

As velocity increases...

• Kinetic energy increases linearly

• Kinetic energy decreases linearly

• Kinetic energy increases by the square of the velocity

• Kinetic energy decreases by the square of the velocity

If you double the mass of an object, what happens to the kinetic energy of that object?

• It stays the same

• It doubles

• It increases by a factor of 4

• It halves

Tags

NGSS.HS-PS3-1

If you halve the mass of an object, what happens to the kinetic energy?

• It stays the same

• It doubles

• It halves

• It decreases by a factor of 4

A lorry is travelling at 20kmph with an empty trailer. The total mass of the lorry is 5 tonnes, and it's kinetic energy is 70kJ. After filling up it's trailed, the lorry now has a mass of 25 tonnes. What is it's kinetic energy now?

• 70kJ

• 140kJ

• 350kJ

• 1750kJ

Tags

NGSS.HS-PS3-1

If you double the velocity of an object, it's kinetic energy...

• stays the same

• doubles

• increases by factor 4

• decreases by factor 8

Tags

NGSS.HS-PS3-2

An object slows down to 1/3 of it's original velocity, what happens to the kinetic energy?

• stays the same

• decreases by factor 3

• increases by factor 3

• decreases by factor 9

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A race car accelerates away from the start line. After 1s it is travelling at 10m/s, and has a kinetic energy of 5kJ. At full speed the car is travelling at 100m/s. What is the kinetic energy of the car at full speed?

• 5kJ

• 95kJ

• 50kJ

• 500kJ

Tags

NGSS.HS-PS3-1