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Science > Simple Machines & Etc. > Flashcards

Simple Machines & Etc. Flashcards

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0
Q

Occurs when force is used to move an object through a distance

_____= force • distance

A

Work

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1
Q

Which law is this?

Acceleration of an object by a force is inversely proportional to the mass of the object & directly proportional to the force.

A

Newton’s second law.

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2
Q

Base unit for length in metric system of measurement?

A

Meter

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3
Q

Force exerted by a person (or motor) when using a machine to lift a load.

A

Effort force

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4
Q

Work machine can do in unit of time; numerical product if current & voltage in electric circuit

A

Power

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5
Q

What is the distance over which the effort force acts in a simple machine?

A

Effort distance

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6
Q

What is the measure of force of gravity on an object?

A

Weight

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8
Q

Unit for work?

A

Newton meter

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9
Q

What is a push or a pull?

A

Force

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10
Q

What is the AMA without friction?

A

IMA

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11
Q

Force that resists motion of 2 surfaces that are touching each other?

A

Friction

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11
Q

Which law is this?

And object at rest will stay at rest unless acted on by an unbalanced force. An object in motion will stay in motion at the same speed & in the same direction unless acted on by and unbalanced force. (Inertia)

A

Newton’s first law

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12
Q

What is the point around which a lever turns?

A

Fulcrum

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13
Q

What is a simple machine that consist of flat, sloping surface?

A

Incline plane

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14
Q

What is a simple machine made of long rigid bar that resists on & turns around a support called a fulcrum?

A

Lever

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15
Q

What is the number of times your effort force is multiplied by a machine?

A

AMA

16
Q

Distance from pivot point to point at which the effort force is applied on arm of lever?

A

Effort arm

17
Q

Unit of power; equal or one joule per second

A

Watt

18
Q

How do you calculate speed?

A

Distance ÷ time

19
Q

What is the comparison of amount of energy used per amount of work done?

A

Efficiency

20
Q

Simple machine consisting of 1 or more wheels with rope wrapped around them

A

Pulley

21
Q

Unit of force?

A

Newton

22
Q

Which law is this?

For every action, there is an equal but opposite reaction.

A

Newton’s third law

23
Q

Amount of matter in something; measured in grams

A

Mass

24
Q

Part of lever from the fulcrum to the load?

A

Resistance arm

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