Question

A falling stone takes 0.2 seconds to fall past a window which is 1 m high. From how far above the top of the window was the stone dropped?

Answer 1

@sauravshakya

Answer 2

shall i show the working?

Answer 3

Yep

Answer 4

s= ut +1/2at^2
s- 1 = 1/2 * 9.81 * (0.2)^2
s = 1.196

Answer 5

s=ut+1/2 at^2
x=0+1/2 * 9.81 * (0.2)^2
x=0.196 m

Answer 6

Is the answer 0.196m

Answer 7

but the answer is 0.82

Answer 8

oh got it..

Answer 9

Actually,
s= ut + 1/2 at^2
1 = u*0.2 + 1/2 (9.81) *(0.2^2)
u=4.02 m/s

Answer 10

a falling stone right

Answer 11

Now,
v^2=u^2+2as
(4.02)^2=0^2+2*(9.81)*x
x=0.82m

Answer 12

Yes, the falling stone takes 0.2 seconds to reach the ground from the window

Answer 13

got it?