Question 1

the idea that energy cannot be created or destroyed

Accepted Answer

law of conservation of energy

Answer

work

Answer

force

Answer

friction

Question 2

the ______________ done on an object changes the amount of energy it has

Accepted Answer

work

Answer

force

Answer

efficiency

Answer

momentum

Question 3

the location of an object is its

Accepted Answer

position

Answer

effort

Answer

velocity

Answer

mass

Question 4

electric motors have a high degree of ____________ because they output 85%

Accepted Answer

efficiency

Answer

acceleration

Answer

fulcrum

Answer

speed

Question 5

the measurement that combines the speed and direction of a moving object is

Accepted Answer

velocity

Answer

effort

Answer

direction

Answer

speed

Question 6

the more _________________ an object has, the easier it is for that object to move other objects

Accepted Answer

momentum

Answer

action force

Answer

load

Answer

kinetic energy

Question 7

the force that opposes the motion of one object moving past another is

Accepted Answer

friction

Answer

energy

Answer

unbalanced force

Answer

gravity

Question 8

the ability to perform work is

Accepted Answer

energy

Answer

velocity

Answer

position

Answer

input

Question 9

a _______________ is a pivot point for a lever

Accepted Answer

fulcrum

Answer

potential energy

Answer

balanced force

Answer

simple machine

Question 10

units of ______________ are the newton and the pound

Accepted Answer

force

Answer

weight

Answer

gravity

Answer

speed

Question 11

what is the change in velocity over time

Accepted Answer

acceleration

Answer

speed

Answer

distance

Answer

momentum

Question 12

when two forces act on an object in opposite directions, it is called

Accepted Answer

balanced force

Answer

unbalanced force

Answer

reaction force

Answer

action force

Question 13

energy that is stored is called

Accepted Answer

potential energy

Answer

heat energy

Answer

sound energy

Answer

kinetic energy

Question 14

what kind of machine takes one force and changes it to a different force

Accepted Answer

simple

Answer

single

Answer

coiled

Answer

complex

Question 15

the force applied to a machine is called

Accepted Answer

effort

Answer

input

Answer

mass

Answer

load

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