Question

A car is moving at 20 m/s when it begins to increase speed. Every 10 s it gains 5 m/s until it reaches its maximum speed of 50 m/s which it retains.
(i) When does the car reach its maximum speed of 50 m/s?
(ii) Find the distance travelled by the car after 150 s.
(iii) Write down expressions for the speed of the car t seconds after it begins to speed up i.e. from t = 0 s to t = 60 s.

Answer 1

Answer:

I,when it gains 5m/s

ii,the distance is 172m/s

hii,0÷60=60s