Question

Deborah Mobil bergerak dengan kecepatan 20m/s ke arah utara. Jika energi kinetic Mobil tersebut 30.000 joule, berapa massa Mobil tersebut?

Answer 1

Ek = 1/2 x m x v²
30.000 = 1/2 x m x (20)²
30.000 = 200 x m
m = 30.000/200 =>150 kg

Answer 2

Ek = 1/2 m v^2
30.000 = 1/2 m 20^2
30.000 = 200 m
m = 30000/200
= 150 kg