Question

A train starting from railway station attains a speed of 21m/s in 3 seconds prove that it's acceleration will be 7m/s

Answer 1

Answer:

GIVEN:-

Train starts from rest. So, initial velocity, u = 0m/s.

Attains a speed , v = 21m/s in time, t = 3s.

Explanation;-

Using the equation of motion,

v = u + at,

where a is the acceleration.

21 = 0 + a × 3

a = 21 ÷ 3

$a \: = 7 \frac{m}{ {s}^{2} }$

HENCE PROVED

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