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
Answers
Answered by
3
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. ...
Answered by
1
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
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