Chapter 6: Work & Energy

Question 1

What is power measured in?

Answer 1

Watts

1 watt= 1J done in 1s

Question 2

If you double the speed with KE you have how much more energy?

Answer 2

4 times

Question 3

Lever, pulley, wheel&arm, axel, incline plane, wedge, and screw are all what?

Answer 3

Simple Machines

Question 4

For work to be done what has to occur?

Answer 4

Force and movement

Question 5

What are the sources of energy?

Answer 5

Sunlight, Nuclear, and Geothermal energy

Question 6

What form of energy does photosynthesis, solar and wind energy, as well as fossil fuels come from?

Answer 6

Sunlight

Question 7

What are the two main forms of mechanical energy?

Answer 7

Potential and Kinetic

Question 8

If a car is twice as large as another was lifted how much potential energy would it have?

Answer 8

Twice as much

Question 9

If a car speeds up 4 times as fast as it was going how much kinetic energy does it now have?

Answer 9

16 times as much

Question 10

Can a machine multiply input force, distance, or energy?

Answer 10

It can multiply input force and distance but not energy.

Question 11

What is the source of geothermal energy?

Answer 11

Uranium found in the earth.