Question 1

law of motion: an object in motion stays in motion until acted on by a net force

Accepted Answer

1st

Question 2

law of motion: force = mass times acceleration

Accepted Answer

2nd

Question 3

law of motion: For every force there is an equal and opposite force

Accepted Answer

3rd

Question 4

this is needed to do work

Accepted Answer

Energy

Question 5

SI unit for energy and work

Accepted Answer

Joules

Question 6

stored energy based on position

Accepted Answer

Potential

Question 7

energy based on velocity

Accepted Answer

Kinetic

Question 8

downward force acting on falling object

Accepted Answer

Gravity

Question 9

upward force acting on falling object

Accepted Answer

air resistance

Question 10

A system where energy is conserved

Accepted Answer

closed

Question 11

where PE is the greatest for falling object

Accepted Answer

top

Question 12

where KE is the greatest for falling object

Accepted Answer

bottom

Question 13

where PE = KE for falling object

Accepted Answer

halfway

Question 14

force x distance

Accepted Answer

work

Question 15

work / time

Accepted Answer

power

Question 16

lever, pulley, wheel and axle, inclined plane, wedge, and screw

Accepted Answer

simple machines

Question 17

SI unit for power

Accepted Answer

Watts

Question 18

SI unit for force

Accepted Answer

Newtons

Question 19

devices that make work easier

Accepted Answer

machines

Question 20

gravity on Earth is this number value

Accepted Answer

10 m/s/s

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