Question

8.A car is moving with a velocity of 25 m/s. It is brought to rest by applying the brakes which produce a retardation of 0.5 m/s^2. The time taken by the car to come to rest is
(1 Point)

20 s

40 s

50 s

100 s​

Answer 1

Answer:

Brakes are applied so as to produce a uniform acceleration of – 0.5 m / s 2 . ∴ The train will travel 625 meters before it is brought to rest. ...

Answer 2

Answer:

50s

Explanation:

As the retardation is 0.5 m per sec ²

means every sec the speed will decrease by 0.5

Therefore in 2 sec speed will decrease by 1 m per sec

therefore for reducing 25 to 0 we will need to reduce speed by 25 m per sec therefore it will need 2 into 25 seconds which is 50 sec