Question

Jak sie oblicza energie kinetyczną

- m=5kg v= 3m/s

- 4kg v= 2m/s

- m=20kg v=3m/s

Answer 1

Ek = (1/2)mv^2

1. Ek = (1/2)*5*3^2= 45*0,5 = 22,5 J
2. Ek = (1/2)*4*2^2 = 16*(1/2) = 8 J
3. Ek = (1/2)*20*3^2 = 10*9 = 90 J