An elevator without a ceiling is ascending up with an acceleration of 5 ms−2. A boy on the elevator shoots a ball in vertical upward direction from a height of 2 m above the floor of elevator. At this instant the elevator is moving up with a velocity of 10 ms−1, and the floor of the elevator is at a height of 50 m from the ground. The initial speed of the ball is 15 ms−1 with respect to the elevator. Consider the duration for which the ball strikes the floor of elevator in answering following questions. (g=10 ms−2)

An elevator without a ceiling is ascending up with an acceleration of

1.	An elevator without a ceiling is ascending up with an acceleration of 5 ms−2. A boy on the elevator shoots a ball in vertical upward direction from a height of 2 m above the floor of elevator. At this instant the elevator is moving up with a velocity of 10 ms−1, and the floor of the elevator is at a height of 50 m from the ground. The initial speed of the ball is 15 ms−1 with respect to the elevator. Consider the duration for which the ball strikes the floor of elevator in answering following questions. (g=10 ms−2)
Answer» An elevator without a ceiling is ascending up with an acceleration of $5 {ms}^{- 2}$ . A boy on the elevator shoots a ball in vertical upward direction from a height of $2 m$ above the floor of elevator. At this instant the elevator is moving up with a velocity of $10 {ms}^{- 1}$ , and the floor of the elevator is at a height of $50 m$ from the ground. The initial speed of the ball is $15 {ms}^{- 1}$ with respect to the elevator. Consider the duration for which the ball strikes the floor of elevator in answering following questions. ( $g = 10 {ms}^{- 2}$ )

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