Question

A train is starting from a railway station and moving with uniform acceleration attains the speed of 20m/s in 10 sec . Find the acceleration.

Answer 1

Answer:

Initial speed, u = 00 m/s

Final Speed, v = 20 m/s

Time, t = 10 s

By 1st equation of motion,

v = u + at

20 = 0 + a ( 10 )

a = 20/10

a = 2 m/s^2

Answer 2

The acceleration of the train is 2 m/s².

Given: A train starting from a railway station and moving with uniform acceleration attains the speed of 20 m/s in 10 sec.

To Find: The acceleration of the train.

Solution:

• It is said that the train starts from a railway station, so we can say that the train was at rest initially. So, the initial velocity of the train is zero.

• We can solve the numerical by using the formula of motion,

            v = u + at                                                            ...(1)

Where v = final velocity, u = initial velocity, a = acceleration, t = time.

Coming to the numerical, we are given;

v = 20 m/s, u = 0, t = 10 s

Putting respective values in (1), we get;

            v = u + at    

       ⇒ 20 = 0 + a × 10

       ⇒ a = 20/10

              = 2 m/s²

Hence, the acceleration of the train is 2 m/s².

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