why things speed up or slow down Flashcards
1
Q
A car is travelling at 20m/s when the driver sees a red light. He takes 0.5s to react and then applies the brakes, stopping in 3 seconds. What is the driver’s braking distance?
A
30m
2
Q
A driver sees an obstacle on the road. What is the name given to the time it takes for the driver to begin breaking?
A
Reaction time
3
Q
Complete: as speed increases, air resistance will “_”?
A
Increase
4
Q
If a car’s speed is doubled, what happens to the braking time?
A
doubles
5
Q
A driver sees an obstacle on the road. What is the name given to the distance travelled while reacting?
A
Thinking distance
