Question

An object starting from rest travels 20m in first 2second and 160 m in next 4 second what time will be the velocity after 7 seconds from start

Answer 1

Answer:

v=70m/s

Explanation

s1=20m, s2= 160m, t1=2s, t2=4s, t3=1s, u=0

total distance= s1+s2=180m

total time=6s

180= 0+ 1/2*a*6*6

a=10m/s^2

v=u+at

v= (10)(7)

v=70m/s