Energy, Work, Power

What is the equation for power and energy?

• P = E/t
• E = P/t
• T = P x E
• P = W/t

What is being transferred as you do work?

• Energy
• Heat
• Power
• Gravitational Potential Energy

How much work is being done with 200 N of force over 426 meters?

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

• A is Potential, B is Kinetic
• A is Kinetic, B is Potential
• A is Power, B is Work
• A is Work, B is Power

A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?

• 200 J

• 80 J

• 5 J

• 2000 J

Where is the roller coaster gaining potential energy?

• A to B

• B to C

• C to D

• The roller coaster is always losing potential energy

What is a disadvantage to Hydroelectricity?

• lots and lots of pollution

• Kills wild bird population

• Radioactive waste

• Increases potential for flooding

Why is solar energy considered renewable energy?

• It's cheaper than fossil fuels

• The sun's energy would not run out for billions of years

• Solar energy recharges batteries

• All of them

Which of the following is an advantage of using coal as an energy resource?

• There is not an abundant supply of coal.

• Coal is less expensive than oil.

• Burning coal contributes to global warming.

• Coal can be used to produce electricity.

A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:

• 320 W

• 400 W

• 500 W

• 2 000 W