P3a: Speed

Question 1

Describe the relationship between speed, distance and time(2)

Answer 1

increasing the speed increases the distance travelled in the same time

increasing the speed reduces the time needed to cover the same distance.

Question 2

Distance equation

Answer 2

Distance = average speed x time = (u+v)/2 x t

Question 3

How can speed be calculated from distance-time graphs?

Answer 3

gradient(speed) = difference in distance / difference in time

Question 4

What does a curve on a distance time graph show

Answer 4

speed is changing