Speed Flashcards
1
Q
Average speed Eq.
A
average speed = distance ÷ time
2
Q
Why is average speed used?
A
The speed of the car changes during the journey.
3
Q
How many seconds are in an hour?
A
3600
4
Q
What is the speed of a car at certain points?
A
Instantaneous speed.
5
Q
Distance travelled word equation
A
distance travelled = average speed x time
6
Q
Distance travelled SUVAT equation.
A
s = (u+v)/2 x t
7
Q
What happens when the speed increases?
A
- The distance travelled in the same time increases.
- The time needed to cover the same distance decreases.
8
Q
What are the axes of a distance time graph.
A
- y = distance
- x = time
9
Q
What is the gradient of a distance-time graph?
A
Speed
A higher speed means a steeper gradient.
10
Q
Lines of a distance-time graph.
A
- A straight line indicates that speed is constant.
- A curved line shows that the speed is changing.
