Motion Flashcards

1
Q

What is speed

A

A measure of the distance travelled by an object in a unit of time

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2
Q

Speed equation

A

Speed = distance / time

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3
Q

What is velocity

A

Speed of an object, with a given direction

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4
Q

Scalar quantities

A

Only have a size (mass, temp, energy)

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5
Q

Vector quantities

A

Only have a size and direction (weight)

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6
Q

What is acceleration

A

Refers to change in velocity / the rate of change of velocity per unit of time

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7
Q

Acceleration equation

A

Acceleration = change in velocity / time taken

V= u+at
U=v-at
T=v-u/a

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8
Q

Change in velocity =

A

Final velocity - initial velocity

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9
Q

What is the unit for acceleration

A

Measured in m/s^2

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10
Q

On velocity time graphs what is the distance travelled

A

‘Area under line’

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11
Q

Final speed equation

A

(Final speed)^2=(initial speed)^2 + (2 x acceleration x distance)

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12
Q

Distance time graph

A

Straight up = constant speed

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13
Q

Speed time graph

A

Straight up = acceleration

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14
Q

Force is a …….. quantity

A

Vector

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15
Q

Force equation

A

Force = mass x acceleration

F= ma

Mass in Kg

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16
Q

What happens if there is no resultant force

A

The object does not accelerate (remains stationary or at a constant velocity)

17
Q

What is the acceleration of a falling object with no air resistance

A

10m/s^2

18
Q

In the absence of air resistance

A

Every mass will accelerate at 10 metres per second

19
Q

Falling objects with air resistance

A

All resistive forces increase the faster the object is moving

20
Q

What is terminal velocity

A

The maximum velocity attainable by an object as it falls through a fluid

21
Q

Factors affecting terminal velocity

A

Weight

Shape (greater area will have a larger resistance)