Answer:
V = 20.69 km/h
Explanation:
given data
mass car = 1394 kg
mass truck = 2000 kg
velocity of the truck = 17 km/h
solution
we know that here
m1 v = m1 v1 + m2 v2 ..................... 1
so here
0.5 × m1 × v1i² = 0.5 × m × v1f² × + 0.5 × m2 × v2f²
put here value and we get truck initial velocity
v2f = [tex]\frac{2m1v1}{m1+m2}[/tex]
put here value
17 = [tex]\frac{2\times 1394\times V}{1394+2000}[/tex]
V = [tex]\frac{1697}{82}[/tex]
V = 20.69 km/h
