Question

An object starting from rest travels 120 m in first 2 s and 260 m in next 4 s. Find its velocity in 6 s after it starts.

Answer 1

I think it's answer is 2

Answer 2

u=0

t = 2s

s = 120m

s = ut +1/2at square

120= (0)(2)+ 1/2 x a x 4

120 = 2a. (4a/2 = 2a)

a = 120/2 = 60m/s square

6s = v= u +at

= 0+ 60x6

= 360 m/s