Question

find its acceleration and final velocity. 2. 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.
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Answer 1

Answer: acceleration = 60m/s^2 and velocity after 6 sec = 360 m/s

Explanation:

u = 0 and t = 2 and s = 120

FOR FINDING ACCELERATION

s = ut+1/2*at^2

120 = 0*2+1/2*a*(2)^2

120 = 0+1/2*a*4

120 = 1/2*1*4

120 = 2*a

120/2 = a

60 = a therefore acceleration is 60 m/s^2

FOR FINDING VELOCITY IN 6 SECONDS

u = 0 and a = 60 and t = 6(because we are finding for 6 sec)

v = u + at

v = 0 + 60*6

v = 60*6

v = 360 therefore velocity in 6 sec is 360 m/s

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