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3rd Form 2017 > Motion and Forces > Flashcards

Motion and Forces Flashcards

1
Q

What is instantaneous speed?

A

The rate of change of position at a given moment.

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2
Q

How do you calculate instantaneous speed on a graph?

A

Calculate the gradient

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3
Q

What is average speed?

A

The distance traveled divided by the time taken.

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4
Q

How do you calculate average speed from a graph?

A

Read off the total distance travelled, read off the total time taken, use speed = distance / time

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5
Q

What is speed measured in?

A

m/s (metres per second)

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6
Q

What is distance measured in?

A

m (metres)

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7
Q

What is time measured in?

A

t (time)

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8
Q

What is the equation for average speed?

A

(average) speed = distance / time

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9
Q

What is the gradient of a distance time graph?

A

The speed

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10
Q

What does a constant speed look like on a distance time graph?

A

A straight line

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11
Q

What does a stationary object look like on a distance time graph?

A

A flat line

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12
Q

What does an accelerating object look like on a distance time graph?

A

A changing gradient

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13
Q

What is an acceleration?

A

The rate of change of speed

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14
Q

Is speed a vector or scalar?

A

scalar

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15
Q

Is velocity a vector or scalar?

A

vector

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16
Q

Is force a vector or scalar?

A

vector

17
Q

What is a vector?

A

A quantity with both magnitude and direction

18
Q

What is a scalar?

A

A quantity with just a magnitude, but no direction

19
Q

List some vectors

A

Force, velocity, acceleration

20
Q

List some scalars

A

Speed, distance, mass

21
Q

What is weight?

A

The force of gravity on an object

22
Q

What is the equation for weight?

A

W = mg

23
Q

What does W stand for?

A

Weight

24
Q

What does m stand for?

A

mass

25
Q

What does g stand for?

A

Gravitational field strength

26
Q

What is the value of g on earth?

A

10 m/ s^2

27
Q

What is the unit of weight?

A

Newtons

28
Q

What is the unit of mass?

A

Kilograms

29
Q

What is the unit of g?

A

metres per second squared. (m/s/s)

30
Q

What is the equation for pressure?

A

P = F/A

31
Q

What is the unit for pressure

A

Pascals (Pa)

32
Q

What is the unit for area?

A

Metres squared (m^2)

3rd Form 2017 (3 decks)

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