Question

A stone is thrown with an initial speed of 19.8 m/s from a building in a vertically upward
direction. It falls down after 2 s. The height of the building is: (g = 9.8")
(A) 24.7 m
(B) 19.8 m
(C) 9.8 m
(D) 4.9 m​

Answer 1

Answer:

option c is correct

Explanation:

Height of the bridge H=ut+

2

1

gt

2

(Taking downward direction to be positive)

∴ H=(−4.9)(2)+

2

1

(9.8)(2)

2

=9.8 m

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