Test 2 Study Guide Flashcards

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1
Q

Which forces do work: balanced or unbalanced?

A

unbalanced

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2
Q

the base of a building

A

foundation

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3
Q

Opposite poles of a magnet _____________.

A

attract

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4
Q

Who discovered the laws of motion?

A

Sir Isaac Newton

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5
Q

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

A

fulcrum

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6
Q

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

A

moving

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7
Q

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

A

inertia

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8
Q

An electromagnet can generate ___________________ force.

A

electromagnetic

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9
Q

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

A

in motion

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10
Q

A machine is a device that makes ______________ easier.

A

work

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11
Q

Why does the moon have less gravity than the earth?

A

It is smaller.
It has less mass.

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12
Q

the push or pull on an object to move it

A

force

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13
Q

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

A

pyramid

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14
Q

acts like a giant electromagnet

A

Earth

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15
Q

the movement resulting from force

A

work

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16
Q

this increases with a rough surface

A

friction

17
Q

two objects bumping into each other

A

collision

18
Q

this has a magnetic field because of its polarity

A

magnet

19
Q

the amount of matter an object has

A

mass

20
Q

a type of inclined plane

A

screw

21
Q

this machine can help overcome friction

A

wheel and axle

22
Q

this machine is designed to overcome weight and make lifting easier

A

pulley

23
Q

Sound is an example of _______________ energy in a collision.

A

converted

24
Q

A ____________ gives a building its shape.

A

frame

25
Q

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

A

speed

26
Q

Wax can be used as a _____________ to minimize friction.

A

lubricant

27
Q

____________ forces allow work to be done.

A

Unbalanced

28
Q

_____________ forces prevent work from being done.

A

Balanced