Question

A stone is thrown vertically upwards from cliff with velocity 5 m/s. It strikes the pond near the base of cliff after 4 s. The height of cliff is:

Answer 1

Answer:

60 m is the height of the cliff.

Explanation:

U = 5

t = 4sec

For upward journey t = 1/2 sec

For downward journey t = 3.5 sec

By using Newton's formula,

h = 60 m

(use value of g as 9.8)

(If you use g=10 then ans is 57m)