A bullet fired vertically from upward from a gun held 2.0 m above the ground…

A bullet fired vertically from upward from a gun held 2.0 m above the ground reaches its maximum height in 4.0s. calculate its initial velocity.
[g = 10ms-2]
  • A.
    10 ms-1
  • B.
    8 ms-1
  • C.
    40 ms-1
  • D.
    20 ms-1
Correct Answer: Option C
Explanation

At maximum height, the final velocity, v = 0
thus from v = u + at
0 = u – at
∴ U = at = 10 x 4 = 40 mls

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