Question

22. A stone is allowed to fall freely
downwards initially at rest from the top of a
tower. The time taken by the stone to reach
the bottom of the tower is 4 seconds. What is
the height of the tower? Take, acceleration due
to gravity = 32 ft/s2
(a) 64 ft.
(b) 32 ft.
(c) 48 ft.
(d) 256 ft.​

Answer 1

Answer:

a) 64 ft.

Explanation:

In freefall,

Given:

Initial velocity of stone is 0.

Acceleration due to gravity 32ft/sec^2.

Solution:

By 2nd equation of kinematics,

S=ut+1/2at^2

S is to be height of tower = h .

h =0×4+1/2×32×4

h=64 ft.

option A is correct