A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance from the top of the building. Speed of the ball as it crosses the top edge of the window is (g=10m/s2)

Question

A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance from the top of the building. Speed of the ball as it crosses the top edge of the window is (g=10m/s2) (A) 3.5 ms-1 (B) 8.5 ms-1 (C) 5 ms-1 (D) 12 ms-1

Tardigrade Admin · Accepted Answer

3 = (ν × 0.5) + (1/2) × 10 × (0.5)2

Q. A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance from the top of the building. Speed of the ball as it crosses the top edge of the window is $(g = 10 m / s^{2})$

$3.5 m s^{- 1}$

$8.5 m s^{- 1}$

$5 m s^{- 1}$

$12 m s^{- 1}$

3 = $(ν \times 0.5) + \frac{1}{2} \times 10 \times (0.5)^{2}$

Q. A ball is dropped from the top of a building. The ball takes 0.5s to fall past the 3m length of a window at certain distance from the top of the building. Speed of the ball as it crosses the top edge of the window is (g=10m/s2)

3.5ms−1

8.5ms−1

5ms−1

12ms−1