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Physics - Mechanics - Looking at Forces > Mr Webber Stuff > Flashcards

Mr Webber Stuff Flashcards

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1
Q

What is the Prefix value of a Picometer?

A

1 x 10*-12

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2
Q

What is the Prefix value for a Nanometer?

A

1 x 10*-9

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3
Q

What is the Prefix value for a Micrometer?

A

1 x 10*-6

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4
Q

What is the Prefix value for a Millimeter?

A

1 x 10*-3

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5
Q

What is the Prefix value for a kilometer?

A

1 x 10*3

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6
Q

What is the Prefix value for a Mega?

A

1 x 10*6

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7
Q

What is the Prefix value for a Giga?

A

1 x 10*9

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8
Q

What is the Prefix value for a Tera?

A

1 x 10*12

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9
Q

How do you find the Centre of Gravity?

A
  • Hang a plug hole over a nail
  • Punch some holes into a shape
  • Hang the shape from the nail
  • Trace with a pen the direction of the string
  • Do this three times in different directions
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10
Q

What helps with Stability?

A

Wide base

Low centre of Gravity

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11
Q

What is the Weight equation?

A

W = m x g

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12
Q

What is the Moment equation?

A

Moment = Force x Perpendicular turning distance

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13
Q

What is the Principle of Moments?

A

For a system in equilibrium

- the sum of the clockwise moments EQUALS the sum of the anticlockwise moments

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14
Q

What is Laminar Flow?

A
  • No mixing of layers
  • Minimal Drag
  • Streamline flow
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15
Q

What is Turbulent Flow?

A
  • Mixing of layers
  • Swirling currents
  • Change in direction
  • Energy is transferred to the surroundings
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16
Q

What is Upthrust?

A

Weight of fluid displaced

17
Q

What is the Density equation?

A

m= V x Q

18
Q

What is Work Done?

A

Is the force needed to move an object over a certain distance

19
Q

What is Power?

A

Rate of energy released per second - Rate of energy transfer E/t

20
Q

What is Efficiency?

A

Percentage of useful energy from total input.

21
Q

What is the Efficiency Equation?

A

Useful energy in out/Total energy X 100

22
Q

What is ANOTHER equation for Efficiency?

A

Useful power transferred/Total power supplied

23
Q

What are the Trigonometry equations?

A

O A O

S H C H T A

24
Q

What is the Kinetic Energy Equation?

A

KE = 0.5 x m x v*2

25
Q

Using the KE equation what is the equation rearranged to V

A

V*2 = 2 x m x g x h

26
Q

What is the GPE equation?

A

G = mgh

Physics - Mechanics - Looking at Forces (37 decks)

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