Question

A stone is thrown vertically upwards from the top of a building, with a speed of 14.7 m/s. If it returns to the earth in 8s, calculate the height of the building.

Answer 1

Answer:

height of building=(14.7×8)m

Answer 2

Answer:

196 m

Explanation:

u=14.7 m/s

g=-9.8 m/s

t=8s

net displacement, s = -h

now, s =ut+1/2gt*2

-h = 14.7x8 + 1/2x(-9.8)x8*2

= 117.6 -313.6

= -196m

h=196 m