Question

A stone of mass 0.55 kilograms is released and falls to the ground. Measurements show that the stone has a kinetic energy of 9.8 joules at the point of impact with the ground. What is the stone's velocity when it hits the ground?

6.3 meter/second
7.2 meter/second
8.1 meter/second
9.3 meter/second

Answer 1

u know the formula of kinetic energy\[K=\frac{ 1 }{ 2 }mv ^{2}\]

Answer 2

here kintic energy K=9.8 J

Answer 3

mass m=0.55 Kg

Answer 4

try to find out the velocity v