Question

The driver of a train travelling at 40ms-1 applies the brakes as a train enters the station. The train slows down at a rate of 2ms2 . Calculate the distance travelled?

Answer 1

Answer:

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Explanation:

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Answer 2

Question

The driver of a train traveling at 40ms −1

applies the brakes as the train enters a station. The train slows down at a rate of 2ms −2

The platform is 400m long. Will the train stop in time?

Solution

Initial speed =u=40ms −1

Acceleration =a=−2ms −2

Final speed =v=0

Now, s= Distance train travels before stopping

Now, we know from the equations of motion that

v 2 =u 2+2as

0=40 2 +2×(−2)×s

4s=1600⇒s=400m

So, the train covers 400m before stopping

Also, the length of platform =400m

So, the train stops in time

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