Question

A train accelerates from rest for time T1 at a constant rate alpha and then it retards at the constant rate beta for time T2 and comes rest. the ratio T1 and T2 is equal to​

Answer 1

Answer:

t1/t2 =beta/alpha

Explanation:

in first case,

u=0, t =t1, a=alpha,

so by using v=u + at,

we get v = alpha × t1

in second case,

v=0, t= t2, a= -beta , u= alpha × t1

so by using v=u + at

we get 0 = alpha × t1 - beta × t2

alpha × t1 = beta × t2

t1/t2 = beta/alpha

Answer 2

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