Question

An object starting from rest travels 20m in first 2secs and 160m in next 4secs. What will be its velocity after 7secs from start.

Answer 1

as the body started from rest then tavelled upto 2 secs therefore;

d=20m in 0-2secs

then the body travelled 160 m in next 4 secs therefore ;

d=160 in 2-6secs

total d=( 160+20)m=180m

total t= 6secs

so,velocity after 7secs from start is 180m/6secs=30m/s

hope it helps!! :)