Question

Calculate the initial velocity of a train which is stopped in 50 seconds by applying breaks. The retardation is 5m/s^2.


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Answer 1

Answer:

250 m/s

Step-by-step explanation:

Given

Calculate the initial velocity of a train which is stopped in 50 seconds by applying breaks. The retardation is 5 m/s²

To Find

Initial velocity

Solution

We know that

Here

u = Initial velocity

v = Final velocity

a = Acceleration

t = Time

According to the question

We are asked to find "u"

Given that

v = 0 m/s [stars from rest]

a = -5 m/s²

t = 50 s

Substituting the values

We get

Therefore

Hence

Initial velocity = 250 m/s