A body is thrown vertically upward from a point on ground. The body reaches a height above the ground at times t = 3 sec and t = 6 sec. Then velocity of projection is
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a
b
c
45 m/s
d
answer is C.
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Detailed Solution
v=u+atThe velocities at t=3m/s and t=6 m/s will be equal and opposite. hence u-3g= 6g-u9g= 2uu= 45m/s
A body is thrown vertically upward from a point on ground. The body reaches a height above the ground at times t = 3 sec and t = 6 sec. Then velocity of projection is