P1: Speed Flashcards

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1
Q

What is the calculation for speed?

A

Speed = Distance/Time

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2
Q

What is the calculation for Distance?

A

Distance = Speed x Time

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3
Q

Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?

A

Distance = Speed x Time

Distance = 8 x 4

Distance = 32km

Shona has travelled 32km.

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4
Q

Alan travels 100km in 5hrs. Find his average speed in km/h.

A

Speed = Distance/Time

Speed = 100/5

Speed = 20km/h.

Alan’s average speed is 20km/h

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5
Q

Joanna drives for 400km at an average speed of 80km/h. How long was her journey?

A

Time = Distance/Speed

Time = 400/80

Time = 5hrs

Joanna’s journey was 5hrs long.

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6
Q

An earthworm moves at a distance of 45cm in 90 seconds. Find the speed of the earthworm.

A
Speed = Distance/Time
Speed= 45/90
Speed= 0.5 cm/s
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7
Q

How do you calculate Time?

A

Time = Distance/Speed

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8
Q

If you walk for 1 and 1/2 hours at an average speed of 4 miles/h. How far will you have walked?

A

Distance = Speed × Time

Distance = 4 × 1.5 = 6 miles

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9
Q

If the distance is in km and the time is in h what is the units of speed?

A

Speed is in km/h

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10
Q

A car has a stopping distance of 18 metres. The braking distance was 12 metres. How far did the car travel during the thinking distance?

A

6 metres

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11
Q

On a distance-time graph - what does the steepness (gradient) of the line represent?

A

Speed. The steeper the gradient the faster it is going.

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12
Q

On a distance-time graph, what does a flat horizontal line represent?

A

Where the object is stationary.

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13
Q

On a distance time graph, a single straight diagonal line means ……..

A

…..the object is travelling at a steady speed.

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14
Q

At which point on the graph is the vehicle travelling at its fastest?

A

C

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15
Q

How long is the vehicle stopped for at point B?

A

10 seconds

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