Answer:
Speed of the wreckage = 49.29 km/hr
Explanation:
This question is solved simply by using the conservation of momentum law.
The momentum of the three moving bodies are calculated below:
Momentum of Car 1 : 1100 * 55 = 60500 kg.km/hr
Momentum of Truck : 480 * 37 = 17760 kg.km/hr
Momentum of Car 2 : 1300 * 49 = 63700 kg.km/hr
Total mass of all three vehicles: 1100 + 480 + 1300 = 2880 kg
The final momentum equals the initial momentum if it is conserved. Thus we have the following equation:
Final Momentum = Initial Momentum
Final Velocity * Total mass = Momentum of all three vehicles combined
Final Velocity * 2880 = 60500 + 17760 + 63700
Final Velocity = 49.29 km/hr
Answer: The location where two air masses meet.
Explanation:
A front is a middle zone between two air masses. Each air mass exhibit different densities. The air masses also differ in humidity and temperature. The front is responsible for changing the climatic condition of a region.
