Question

A 25 kg rock falls for 2.7 seconds. How many meters tall was the building?

Answer 1

35.7m

Step-by-step explanation:

Given parameters:

Mass of rock = 25kg

Time of fall = 2.7s

Unknown:

Height of the building = ?

Solution:

To solve this problem, we will use one of the motion equations;

S = ut +
`(1)/(2)` gt²

S is the height

u is the initial velocity = 0m/s

t is the time

g is the acceleration due to gravity

S = (0 x 2.7) +
`(1)/(2)` x 9.8 x 2.7² = 35.7m