P1: Speed Flashcards
What is the calculation for speed?
Speed = Distance/Time
What is the calculation for Distance?
Distance = Speed x Time
Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?
Distance = Speed x Time
Distance = 8 x 4
Distance = 32km
Shona has travelled 32km.
Alan travels 100km in 5hrs. Find his average speed in km/h.
Speed = Distance/Time
Speed = 100/5
Speed = 20km/h.
Alan’s average speed is 20km/h
Joanna drives for 400km at an average speed of 80km/h. How long was her journey?
Time = Distance/Speed
Time = 400/80
Time = 5hrs
Joanna’s journey was 5hrs long.
An earthworm moves at a distance of 45cm in 90 seconds. Find the speed of the earthworm.
Speed = Distance/Time Speed= 45/90 Speed= 0.5 cm/s
How do you calculate Time?
Time = Distance/Speed
If you walk for 1 and 1/2 hours at an average speed of 4 miles/h. How far will you have walked?
Distance = Speed × Time
Distance = 4 × 1.5 = 6 miles
If the distance is in km and the time is in h what is the units of speed?
Speed is in km/h
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?
6 metres
On a distance-time graph - what does the steepness (gradient) of the line represent?
Speed. The steeper the gradient the faster it is going.
On a distance-time graph, what does a flat horizontal line represent?
Where the object is stationary.
On a distance time graph, a single straight diagonal line means ……..
…..the object is travelling at a steady speed.
At which point on the graph is the vehicle travelling at its fastest?
C
How long is the vehicle stopped for at point B?
10 seconds
