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Physics > P9 Motion > Flashcards

P9 Motion Flashcards

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1
Q

what is a vector quantity

A

A quantity which has both magnitude (size) and a direction

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2
Q

define velocity

A

the speed of an object in a certain direction

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3
Q

What is the difference between speed and velocity

A

speed is just how fast something is going with no regard if direction it is a scalar quantitiy
velocity is speed in a given direction it is a vector quantity

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4
Q

define distance

A

how far an object has moved

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5
Q

what is a scalar quantity

A

a measure that doesn’t involve direction

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6
Q

what is the typical speed of someone walking

A

1.5m/s

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7
Q

what is the typical speed of someone running

A

3m/s

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8
Q

what is the typical speed of someone cyclinng

A

6m/s

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9
Q

what is the typical speed of a car

A

25m/s

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10
Q

what is the typical speed of a train

A

30m/s

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11
Q

what is the typical speed of a plane

A

250m/s

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12
Q

what will affect the speed someone travels at

A
  • fitness
  • age
  • terrain
  • wind speed
  • pressure
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13
Q

what is acceleration

A

how quickly something is speeding up

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14
Q

in a distance-time graph what does a steeper gradient represent

A

a faster speed

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15
Q

in a distance-time graph what does a flat section represent

A

the object is stationary

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16
Q

in a distance-time graph what do curves represent

A

acceleration or deceleration

17
Q

in a velocity-time graph what do curves represent

A

changing acceleration

18
Q

in a velocity-time graph what does the gradient represent

A

acceleration

19
Q

in a velocity-time graph what do flat sections represent

A

the object is travelling at a steady speed

20
Q

what are waves

A

waves transfer energy without transferring matter

21
Q

In waves do the particles move

A

no

22
Q

What are transverse waves

A

where the particles ossilate perpendicular to the direction of energy transfer

23
Q

give three examples of transverse waves

A
  • tidal
  • electromagnetic
  • seismic S
24
Q

what are longitudinal waves

A

where the particles are parallel to the direction of energy transfer

25
Q

give three examples of longitundinal waves

A
  • sound
  • untra-sound
  • seismic P
26
Q

what are the things on the longitudinal waves

A

compressions and rarefactions

27
Q

what is the equation for speed

A

distance / time

28
Q

in distance-time graphs what does the gradient represent

A

speed

29
Q

in velocity-time graphs what does the gradient represent

A

acceleration

30
Q

what is the equation for acceleration

A

(final speed - start speed) / time

Physics (13 decks)

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