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Physics > Combined science P1 - Forces and motion > Flashcards

Combined science P1 - Forces and motion Flashcards

1
Q

What is the speed of an airliner

A

250 m/s

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2
Q

What is the speed of a high speed train

A

90 m/s

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3
Q

What is the speed of a commuter train

A

55 m/s

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4
Q

What is the speed of the motorway speed limit

A

31 m/s

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5
Q

What is the speed of a ferry

A

18 m/s

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6
Q

What is the speed of the speed limit in towns

A

10.5 m/s

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7
Q

What is the speed of cycling

A

6 m/s

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8
Q

What is the speed of walking

A

1.4 m/s

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9
Q

30 mph =

A

13 m/s

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10
Q

70 mph =

A

31 m/s `

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11
Q

What is the speed of something with a distance of 100 metres and a time of 12 seconds

A

8.3 m/s

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12
Q

What is the distance of something with a speed of 8 metres per second and a time of 25 seconds

A

200 m

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13
Q

What is the time of something with a distance of 400 metres and a speed of 8 m/s

A

50 s

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14
Q

What is the speed of something with a distance of 800 metres and a time of 125 seconds

A

6.4 m/s

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15
Q

What is the distance of something with a speed of 6 metres per second and a time of 500 seconds

A

3000 m

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16
Q

What is the time of something with a distance of 2000 metres and a speed of 6.25 m/s

A

320

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17
Q

What are the scalars? [6]

A

Distance, speed, energy, mass, time and temperature

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18
Q

What are the vectors? [6]

A

Acceleration, displacement, velocity, weight, force and momentum

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19
Q

What is a scalar

A

Scalars are a quantity that have magnitude (size)

20
Q

What is a vector

A

Vectors have magnitude (size) and direction

21
Q

What is the difference between displacement and distance travelled

A

Displacement is the distance from the start whereas distance is how far travelled.

22
Q

What is acceleration

A

The measure of how quickly the velocity of something is changing. It can be positive if the object is speeding up or negative if it is slowing down. Acceleration is a vector quantity.

23
Q

What is displacement

A

The distance travelled in a particular direction

24
Q

What is velocity

A

The speed of the object in a particular direction usually measured in metres per second m/s. Velocity is a vector, speed is not.

25
Q

What is momentum

A

How hard it is to make an object stop or change direction; or how much damage something might don on impact. Momentum is a vector quantity measured in kilogram metres per second Kgm/s

26
Q

What does a horizontal line on a distance time graph mean

A

The object (distance from the starting point) is not changing

27
Q

What does a straight sloping line on a distance time graph mean

A

The object is travelling at a constant speed

28
Q

What does a steeper line on a distance time graph mean

A

The the object is travelling faster

29
Q

How is speed calculated on a distance time graph

A

By the gradient of the line

30
Q

What is the equation for acceleration

A

Change in velocity m/s
acceleration= ————————————
Time taken

31
Q

What is the letters for the equation of acceleration

A

v-u
a= ——-
t

32
Q

What is the equation for acceleration (harder)

A

v2 - u2 = 2 x a x d

33
Q

How do you get accurate data for velocity and time as an object falls

A

Using light gates and a data logger as the object goes through the the first light gate and then the second it calculates the data

34
Q

What is the text book value for acceleration due to gravity

A

g = 10 m/s2

35
Q

A dog chasing a cat accelerates from the rest at 2 m/s2. How long will it take the dog to reach a velocity of 10 m/s

A

5 seconds

36
Q

What do curved lines on a distance time graph

A

Changing speed

37
Q

What is instantaneous speed

A

Speed at a particular instant

38
Q

Gradient of a velocity time graph =

A

Time

39
Q

On a velocity time graph what does a horizontal line mean

A

The object is travelling at constant velocity

40
Q

On a velocity time graph what does a sloping line mean

A

The object is accelerating

41
Q

On a velocity time graph what does a steeper line mean

A

Greater acceleration

42
Q

On a velocity time graph how do you find the distance travelled

A

Area under the graph

If you split the graph into easier shapes to calculate and then add them together to find the areal

43
Q

What is the equation of momentum

A

Mass x Velocity

44
Q

Does a slow heavy object have lots of momentum

A

Yes

45
Q

Does a small fast moving object have lots of momentum

A

Yes

46
Q

All measurements have a….

A

Magnitude

47
Q

Scalar quantities have only magnitude, vector quantities have magnitude and ….

A

Direction

Physics (6 decks)

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