STANDARD Physics Free Fall MCQ Question
A girl standing on a stationary lift (open from above) throws a ball upwards with initial speed 50 m s⁻¹. The time taken by the ball to return to her hands is (Take g = 10 m s⁻²)
5 s
10 s
15 s
20 s
Correct Answer
Detailed Explanation
Using the equation S = ut + 1/2 at², with S = 0, u = 50 m s⁻¹, and a = -10 m s⁻², we find the time to reach the highest point is 5 s. Therefore, the total time for the ball to return is 2 × 5 s = 10 s.
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