Question

A stone is dropped from a bridge and it reaches the ground in 4 seconds. The height of the bridge is (g = 10 m/s)
O 80 m
O 64 m
0 260 m
O 2000 m​

Answer 1

Answer:

80m

Explanation:

initial velocity (U) = 0

acceleration by gravity (g) = 10 m/s^2

time (t) = 4 seconds

h = ut+1/2at^2

h= 1/2(160)

h=80m