The velocity acquired by a body moving with uniform acceleration is 12 m/s in 2 s and 18 m/s in 4 s. Find the initial velocity of the body.
Answers
Answered by
12
I think answer should be 6m/s...
Answered by
61
v = u + at
12 = u + 2a
and
18 = u + 4a
Subtract first equation from second.
18 - 12 = u - u + 4a - 2a
6 = 2a
a = 3 m/s^2
12 = u + 2a
and
18 = u + 4a
Subtract first equation from second.
18 - 12 = u - u + 4a - 2a
6 = 2a
a = 3 m/s^2
yess
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12 = u + 2*3
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