Question

A stone falls from rest. The total distance covered by it in the last second of its motion is equal to
covered in the first three seconds. What is the height from which the stone was dropped? Take gan
(1) 25 m
(2) 100 m
(3) 125 m
(4) 200 m
​

Answer 1

Answer:

Thanks, same as the first time in the next few days.

Answer 2

Answer:

125

Explanation:

s(t)= ut+1/2 at^2

s(3)=0+1/2×10×9

=45

s= u+a(t-1/2)=45

10(t-1/2)=45

t=5

s(5)=1/2×10×5^2

=125