Question

a ball is dropped from an 80m building .what is the ball's velocity after 3 secs ?use an order of magnitude estimation to identify the correct option.
a.-2.9m/s b.-29.4m/s c.-8.8m/s d.-88.3m/s​

Answer 1

Answer:

please follow my I'd please guys

Answer 2

Answer:

b)29. 4 m/s

Explanation:

assuming the ball starts from rest

initial v= 0

final v=?

time=3 sec

consider ing acceleration due to gravity as 9.8 according to question

a=v-u/t

9.8=v-0/3

v=9.8×3

v=29.4 m/s