Work, Energy, Power

Kinetic Energy is defined as

• Energy stored due to its location
• Energy of motion
• Energy stored in the bonds of molecules
• Heat energy

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s
• A 50 kg toddler running at  30 m/s
• A 90 kg toddler running at 30 m/s
• A 100 kg  toddler running at 2 m/s

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?

• Potential Energy
• Kinetic Energy
• Nuclear Energy
• Chemical Energy

The unit for energy and work is

• J

• N

• m/s

• m/s/s

A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is

• 60 J
• 600 J
• 17 J
• 2.4 J

If you exert a force of 20 N to push a desk 10 m, how much work did you do to the desk?

• 20 N
• 200 N
• 200 J
• 2 J

The law of conservation states that

• every action has an equal and opposite reaction
• all matter has thermal energy
• energy cannot be created or destroyed, only changes form
• heat moves from an object of higher temperature to an object of lower temperature

The ability to do work is called

• energy
• thermal
• kinetic
• potential

Mechanical energy is the combination of potential or ________.

• Electrical energy

• Kinetic enery

• Chemical energy

• Light energy

Which position has the most potential energy?

• A
• G
• C
• D