Speed

Question 1

Average speed Eq.

Answer 1

average speed = distance ÷ time

Question 2

Why is average speed used?

Answer 2

The speed of the car changes during the journey.

Question 3

How many seconds are in an hour?

Answer 3

3600

Question 4

What is the speed of a car at certain points?

Answer 4

Instantaneous speed.

Question 5

Distance travelled word equation

Answer 5

distance travelled = average speed x time

Question 6

Distance travelled SUVAT equation.

Answer 6

s = ^(u+v)/2 x t

Question 7

What happens when the speed increases?

Answer 7

• The distance travelled in the same time increases.
• The time needed to cover the same distance decreases.

Question 8

What are the axes of a distance time graph.

Answer 8

• y = distance
• x = time

Question 9

What is the gradient of a distance-time graph?

Answer 9

Speed

A higher speed means a steeper gradient.

Question 10

Lines of a distance-time graph.

Answer 10

• A straight line indicates that speed is constant.
• A curved line shows that the speed is changing.