Question

A train starting from a raliway station and moving with uniform acceleration, attains a speed of 40 km/hr in 10 minutes. Find it's acceleration​

Answer 1

a=v-u/t

a=0-40/10

answer is -4km /h

Answer 2

Answer:

u= 0( initial velocity)

v= 40 km/hr( final velocity)

t= 10 min= 10/60=1/6 hour.

a=(v-u)/t

(40-0)/(1/6)

40÷1/6= 40*6/1= 240 km/hr^2

acceleration= 240km/hr^2

in m/s^2

v= 40 km/hr= 40*5/18 m/s= 100/9 m/s.

t=10 min (1 min= 60s)= 10*60=600s.

a=(v-u)/t

= (100/9-0)/600

100/9÷600

100/9*1/600= 1/54= 0.0185 m/s^2.

acceleration= 0.0185m/s^2.

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