Question

velocity of a train changes from the 20m/s to 25 m/s when it accelerates at a rate of 20 m per second find the distance covered by the train

Answer 1

u = 20 m/s

v= 25 m/s

a = 20 m/s^2

using third equation of motion we get,

${v}^{2} - {u}^{2} = 2as \\ {25}^{2} - {20}^{2} = 2 \times 20 \times s \\ 225 = 40s \\ s = 5.625m$

the distance covered by the body is 5.625 m