Question

Consider a 100 g object dropped from a height of 1 m. Assuming no air friction (drag), when will the object hit the ground and at what speed? Take g 9.81 m/s m/'s.

Answer 1

speed and time are Vf = 4.43 m/s and t = 0.45 s

Step-by-step explanation:

This is a problem of free fall, we have the equations of kinematics

Vf² = Vo² + 2g x

As the object is released the initial velocity is zero, let's look at the final velocity with the equation

Vf = √( 2 g X)

Vf = √(2 9.8 1)

Vf = 4.43 m/s

This is the speed with which it reaches the ground

Having the final speed we can find the time

Vf = Vo + g t

t = Vf / g

t = 4.43 / 9.8

t = 0.45 s

This is the time of fall of the body to touch the ground