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physics y9 > Motion > Flashcards

Motion Flashcards

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1
Q

What is speed

A

How fast your going with no direction

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2
Q

What is velocity

A

The speed of an object in a specific direction (the vector of speed)

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3
Q

What is displacement

A

The distance travelled in a specific direction

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4
Q

Average speed equation

A

Average speed = total distance/ total time

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5
Q

What does the gradient of a distance/time graph show

A

The steady speed

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6
Q

What do the flat sections on a distance/ time graph show

A

Stopped

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7
Q

How to show acceleration on a distance/ time graph

A

With a steeper gradient line

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8
Q

What do curves getting steeper on a distance/time graph show

A

Accelerating (not constant)

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9
Q

What does a levelling off curve on a distance/time graph show

A

Decelerating (not constant)

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10
Q

How to show acceleration on a velocity/time graph

A

Gradient

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11
Q

What do flat sections mean on a velocity/time graph

A

Steady speed

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12
Q

What do curves on a velocity/time graph mean )

A

Changing acceleration )

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13
Q

What do downhill sections on a velocity/time graph show \

A

Deceleration \

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14
Q

How do find the distance travelled on a velocity/time graph

A

The area

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15
Q

Acceleration equation

A

a= (v-u) /t

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16
Q

Acceleration unit

A

m/s^2

17
Q

What is acceleration

A

The rate of change of velocity

18
Q

Displacement letter

A

S

19
Q

Average velocity equation

A

Average v = u+v/2

20
Q

Displacement equation

A

(u+v/2) t (average velocity x time)

21
Q

Mean velocity equation

A

Velocity = displacement/ time

22
Q

Stopping distance equation

A

Stopping distance= thinking distance + braking distance

23
Q

What is thinking distance

A

The distance the car travels in the time between the driver noticing the hazard and applying the brakes

24
Q

What is braking distance

A

The distance the car travels during its deceleration whilst the brakes are being applied

25
Q

Factors that affect stopping distance

A

Increase: tiredness, alcohol, distractions
Decrease: caffeine

26
Q

What is a scalar quantity

A

Only has size (magnitude)

27
Q

What is a scalar quantity

A

Only has size (magnitude)

28
Q

What is a vector quantity

A

Has both size (magnitude) and direction

physics y9 (4 decks)

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