Question

5
The speed-time graph of a car is shown below. The car weights 1000 kg.
() Find the distance covered by the car in first two seconds.
(ii) Find how much force is applied by the car brakes in the fifth second so that the car comes to a halt by sixth
second?​

Answer 1

Answer:

i) 1/2 *2 *15 = 15

ii) mass of the car = 1000kg

F= ma

Now, a= slope

0-15/6-5=15m/sec square

Thus, F= ma

=1000*(-15)N

=-15000N

Explanation:

Negative sign indicates that it is a braking force