What is the kinetic energy of an object with a mass of 3 kg that has been in freefall for 7 s?

1 Answer
May 19, 2016

E_k=7073.35" "J

Explanation:

"first; let's find velocity of object for t=7"

v=-g*t
v=-9*81*7
v=-68.67 m/s

"The Kinetic Energy of an object is calculated by:" E_k=1/2*m*v^2

m=3 kg

E_k=1/2*3*(-68.67)^2

E_k=7073.35" "J