A cricket ball is hit so that it travels straight up in air and it acquires 3 s to reach the maximum height. Its initial velocity is:
Correct answer: B. 29.4 ms-1
- A. 10 ms-1
- B. 29.4 ms-1
- C. 15 ms-1
- D. 12.2 ms-1
Explanation
To determine the initial velocity needed for the cricket ball to reach its maximum height in 3 seconds, we use the kinematic equation vi = g × t, where g (acceleration due to gravity) is approximately 9.8 m/s2. Substituting the given time t = 3 s, we find the initial velocity vi to be 29.4 m/s. Option B is correct.Options A, C, and D are incorrect because they assume different scenarios or calculations that don't match the conditions described in the question. These values do not satisfy the relationship between time, gravity, and initial velocity needed to reach the maximum height in 3 seconds.
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