Joules and Watts - Review

Energy of motion is

• mechanical energy

• chemical energy

• nuclear energy

• gravitational potential energy

Energy from height is

• thermal energy

• chemical energy

• nuclear energy

• gravitational potential energy

The unit for energy

• Joules

• watts

• Newtons

• seconds

• meters

Tags

NGSS.MS-PS3-4

What is the GPE of a 10 N rock that is 30 m up a hill?

• 300 J

• 3 J

• 2940 J

• 40 J

What is the KE of a 4 kg toy bicycle that is moving at 3 m/s?

• 12 J

• 1.33 J

• 18 J

• 6 J

What is power?

• work per unit time
• force per unit distance
• total energy used
• force over a time interval

What type of energy represents the sum of the KE and PE that a moving object has?

• chemical energy
• total mechanical energy
• electromagnetic energy
• electrical energy

Tags

NGSS.MS-PS3-4

When a rollercoaster cart moves towards the ground, what happens to the PE that it has?

• It transforms into KE
• It leaves the system
• Nothing
• It stays PE

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

The SI unit of work is?

• Joules
• Watts
• Newtons
• meters

Tags

NGSS.MS-PS3-5

The SI unit for power is...?

• Watts
• Joules
• Newtons
• Meters