Question

the stone falls from a building and reaches ground 3 second later how high is the building take g = 10/s
${2}^{2}$
​

Answer 1

Answer:

s=ut +1/2 at²

s=1/2×10 ×9

s=45m

Answer 2

Answer:

given-

u=0ms as object is falling

t=3 sec

g=-10 as downward

by s=ut+1/2gt²

s=0x3+1/2x-10x9

s=-5x9

s=-45m

but height never be negative

so,

s=+45m