Question

A train starting from a railway station and moving with a uniform acceleration attains a speed of 40 kmph in 10 minutes. Find its acceleration.

Answer 1

soln:
initial velovity= 0m/s
final v= 40km/hr=100/3m/s
time=10 s
acceleration=(100/3-0)/10=10/9 m/s^2

Answer 2

From the equations of motion,

v = u + a.t ,

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

a = {v-u}/{t}

Given :

v = 40km/hr = 11.11 m/s

u = 0 km/hr (Assuming)

t = 10 minutes = 600 seconds.

Substituting all the values in the above equation,

a = {11.11}/{600} = 0.0185 m/s^2 (or) 240 km/hr^2