Question

A stone is thrown with an initial speed of 4.9 ms
from a bridge in vertically downward direction. It
falls down in water after 1 second. Find the height
of bridge.​

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Answer 1

Answer:

.nitial velocity of the stone u=−4.9m/s (upwards)

Acceleration of the stone g=9.8m/s

2

(downwards)

Time taken by the stone to fall down in water t=2 s

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

Step-by-step explanation:

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