Answer:
2.40 Km/hr.
Step-by-step explanation:
From the question given above, the following data were obtained:
Mass of truck (m₁) = 3500 kg
Velocity of truck (u₁) = 7 Km/hr
Mass of car (m₂) = 1200 kg
Velocity of car (u₂) = 11 km/hr
Post collision velocity (v) =?
The post collision velocity of the truck and car can be obtained as illustrated below:
m₁u₁ – m₂u₂ = v(m₁ + m₂)
(3500 × 7) – (1200 × 11) = v(3500 + 1200)
24500 – 13200 = v × 4700
11300 = v × 4700
Divide both side by 4700
v = 11300 / 4700
v = 2.40 Km/hr.
Therefore, the post collision velocity of the truck and car is 2.40 Km/hr.