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Science > Work > Flashcards

Work Flashcards

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0
Q

What is required for work to be done?

A

Motion

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1
Q

What is work?

A

A force acting through a distance.

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2
Q

Is carrying something doing work?

A

No way bro

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3
Q

What is the formula for work?

A

W=FD or Work=ForcexDistance

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4
Q

What is the SI Unit for force?

A

Newtons

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5
Q

What is the SI unit for distance?

A

Meters

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6
Q

What is the SI unit for work?

A

Joules

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7
Q

What is a joule equal to?

A

1 N/m

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8
Q

What is power?

A

The rate at which work is done.

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9
Q

What is the SI Unit for power?

A

Watts

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10
Q

What is the SI unit for time?

A

Seconds

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11
Q

What is a horsepower equal to?

A

746 watts

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12
Q

What are machines used for?

A

Makes work easier by changing the size of a force, the direction or the distance in which the force acts.

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13
Q

What is Input force

A

The force you exert on a machine to make it preform.

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14
Q

What is input distance?

A

The distance the input force acts.

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15
Q

What is the work input?

A

The forcexinput distance

16
Q

What is the output force?

A

The force exerted by the machine.

17
Q

What is the output distance?

A

The distance the output force acts.

18
Q

What is work output?

A

Output force x output distance.

19
Q

What is output work always less than?

A

The input work because of friction.

20
Q

What is the formula for actual mechanical advantage?

A

Output force/input force

21
Q

What is the formula for

A

Input distance/output distance

22
Q

What is the ideal mechanical advantage of a lever?

A

Inout distance/output distance

23
Q

What is the formula for Mechanical Efficiency?

A

Work output/work input * 100

24
Q

What is a lever?

A

A rigid bar that rotates around a fixed point called a fulcrum.

25
Q

What does a lever have both of?

A

An effort force and a load (resistance force)

26
Q

What is a first call lever?

A

When the fulcrum is between the input and output force.

27
Q

What is a second class lever?

A

The output force is located between the inout force and the fulcrum. Ex. Wheel barrow,bottle opener, crowbar.

28
Q

What is a third class lever?

A

The input force is between the fulcrum and the output force. Gx: hockey stick, golf club, broom.

29
Q

What is the actual mechanical advantage?

A

The number of times the machine increases an input force.

30
Q

What will the actual mechanical advantage AMA always be less than?

A

The IMA or Ideal mechanical advantage.

31
Q

What is the mechanical efficiency?

A

The percentage of work input that becomes work output.

Science (23 decks)

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