Question

The same retarding force is applied to stop a train, if the speed is doubled then the stopping distance will be

Answer 1

Answer:

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Answer 2

Question :

The same retarding force is applied to stop a train, If the speed is doubled then the stopping distance will be ?

Answer :

Using the Equation of motion

v² - u² = 2as

Let the retarding force cause a retardation acceleration equal to - 2

0² - u² = 2 ( - a)s

Stopping distance = u²/2a

Therefore as the speed is doubled, the distance will become four times.