Test 2 Study Guide

Question 1

Which forces do work: balanced or unbalanced?

Answer 1

unbalanced

Question 2

the base of a building

Answer 2

foundation

Question 3

Opposite poles of a magnet _____________.

Answer 3

attract

Question 4

Who discovered the laws of motion?

Answer 4

Sir Isaac Newton

Question 5

The _______________ is the part of the lever which holds and balances weight.

Answer 5

fulcrum

Question 6

Mass, speed, and direction are all part of an object’s ___________ energy.

Answer 6

moving

Question 7

a property of matter that makes it resist a change in motion

Answer 7

inertia

Question 8

An electromagnet can generate ___________________ force.

Answer 8

electromagnetic

Question 9

An object in motion will stay _________________ unless acted upon by an unbalanced force.

Answer 9

in motion

Question 10

A machine is a device that makes ______________ easier.

Answer 10

work

Question 11

Why does the moon have less gravity than the earth?

Answer 11

It is smaller.
It has less mass.

Question 12

the push or pull on an object to move it

Answer 12

force

Question 13

this is the most stable shape because of a low center of gravity

Answer 13

pyramid

Question 14

acts like a giant electromagnet

Answer 14

Earth

Question 15

the movement resulting from force

Answer 15

work

Question 16

this increases with a rough surface

Answer 16

friction

Question 17

two objects bumping into each other

Answer 17

collision

Question 18

this has a magnetic field because of its polarity

Answer 18

magnet

Question 19

the amount of matter an object has

Answer 19

mass

Question 20

a type of inclined plane

Answer 20

screw

Question 21

this machine can help overcome friction

Answer 21

wheel and axle

Question 22

this machine is designed to overcome weight and make lifting easier

Answer 22

pulley

Question 23

Sound is an example of _______________ energy in a collision.

Answer 23

converted

Question 24

A ____________ gives a building its shape.

Answer 24

frame

Question 25

Energy transfers in a collision can cause the _______________ of objects to change.

Answer 25

speed

Question 26

Wax can be used as a _____________ to minimize friction.

Answer 26

lubricant

Question 27

____________ forces allow work to be done.

Answer 27

Unbalanced

Question 28

_____________ forces prevent work from being done.

Answer 28

Balanced