A very broad elevator is going up vertically with a constant acceleration of 2 m/s2. At the instant when its velocity is 4 m/s a ball is projected from the floor of the lift with a speed of 4 m/s relative to the floor at an elevation of 30∘. The time taken by the ball to return the floor is (g = 10 m/s2) from time of projection.

A very broad elevator is going up vertically with a constant accelerat

1.	A very broad elevator is going up vertically with a constant acceleration of 2 m/s2. At the instant when its velocity is 4 m/s a ball is projected from the floor of the lift with a speed of 4 m/s relative to the floor at an elevation of 30∘. The time taken by the ball to return the floor is (g = 10 m/s2) from time of projection.
Answer» A very broad elevator is going up vertically with a constant acceleration of $2 m / s^{2}$ . At the instant when its velocity is $4 m / s$ a ball is projected from the floor of the lift with a speed of $4 m / s$ relative to the floor at an elevation of $30^{\circ}$ . The time taken by the ball to return the floor is ( $g$ = $10 m / s^{2}$ ) from time of projection.

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