Question 1

is needed to do work

Accepted Answer

energy

Question 2

a quantity with magnitude only

Accepted Answer

scalar

Question 3

a quantity with magnitude and direction

Accepted Answer

vector

Question 4

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

Accepted Answer

simple machines

Question 5

anything that can cause object to accelerate

Accepted Answer

force

Question 6

a disturbance that carries energy

Accepted Answer

wave

Question 7

2 or more waves in the same place at same time

Accepted Answer

superposition

Question 8

are not colors

Accepted Answer

black and white

Question 9

color with highest frequency

Accepted Answer

violet

Question 10

color with lowest frequency

Accepted Answer

red

Question 11

SI unit for mass

Accepted Answer

kilogram

Question 12

shortest distance between 2 points

Accepted Answer

displacement

Question 13

says F = m x a

Accepted Answer

2nd law of motion

Question 14

says "for every force there is an equal and opposite force"

Accepted Answer

3rd law of motion

Question 15

says "an object in motion tends to stay in motion until acted on by net force"

Accepted Answer

1st law of motion

Question 16

anything that has been launched or thrown

Accepted Answer

projectile

Question 17

tendency of object to continue its motion (resist change of motion)

Accepted Answer

inertia

Question 18

a system where energy is conserved

Accepted Answer

closed system

Question 19

stored energy based on position

Accepted Answer

potential energy (PE)

Question 20

energy based on object's velocity

Accepted Answer

kinetic energy (KE)

Question 21

wave that needs a medium

Accepted Answer

mechanical wave

Question 22

time it takes to complete 1 wave cycle

Accepted Answer

period

Question 23

number of waves completed in a set amount of time

Accepted Answer

frequency

Question 24

acceleration toward the center of a curved or circular path at constant velocity

Accepted Answer

centripetal

Question 25

Sound waves with frequencies lower than 20 Hz.

Accepted Answer

infrasound

Question 26

Sound waves with frequencies higher than 20,000 Hz.

Accepted Answer

ultrasound

Question 27

force x distance

Accepted Answer

work

Question 28

SI unit for force and weight

Accepted Answer

Newtons (N)

Question 29

SI unit for power

Accepted Answer

Watts (W)

Question 30

speeding up, slowing down, or changing direction

Accepted Answer

acceleration

Question 31

work / time

Accepted Answer

Power

Question 32

distance / time

Accepted Answer

speed

Question 33

displacement /time

Accepted Answer

velocity

Question 34

object has constant velocity or at rest

Accepted Answer

zero acceleration

Question 35

slowing down in the negative direction or speed up in positive direction

Accepted Answer

positive acceleration

Question 36

slow down in positive direction or speed up in negative direction

Accepted Answer

negative acceleration

Question 37

the amount of matter in an object

Accepted Answer

mass

Question 38

gravity's pull on object's mass

Accepted Answer

weight

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