9. A car driver brakes gently. Her car slows down front -- deceleration?
10. A train slows down from 60m/s to 20m/s in 50s.
a) What is its acceleration?
b) Write your answer in words?
11. The acceleration of car is 10m/s. If the car starts from rest,
a) What will be its speed after 10s?
b) How long it takes to reach a speed 1000m/s?
12. A sprinter has an acceleration of 5m's during the first 2 seconds of the race. What
velocity does she reach after this time?
13. A train increases its velocity from 6m/s to 10m/s. Calculate its acceleration?
14. A car travelling at 20m/s slows down to 10m/s in 25. Calculate its acceleration?
15. Leaving bus stop, the bus reaches a speed of 8m/s after 10s. What is its acceleration?