Question

massa mobil A=MASSA mobil B. , Ek A=22.500 J, Ek B=4 kali Ek A, jika V mobil A= 15m/s, piro V mobil B?

Answer 1

Ek A = 1/2 m (V2) = 22500
= 1/2xm x15 x15 =22500
= 1/2m x 225 = 22500
=1/2m = 22500 : 225
= 1/2m =100
=massa = 100 x2 =200

Ek B = 1/2 x m x v2
90000 = 1/2 x 200 x v2
90000 x 2 : 200= v2
v2 =900
v = 30

Answer 2

Eka / Ekb = Va² / Vb²
22.500 / 90.000 = 15² / Vb
22.500 Vb = 90.000 X 225
Vb = 20.250.000 / 22.500
Vb = 900
Vb = √900
Vb = 30 m/s