A truck and a car move at speeds of 72 km / h and 108 km / h, respectively. Truck weight 4000 kg.
| December 7, 2020 | education
A truck and a car move at speeds of 72 km / h and 108 km / h, respectively. Truck weight 4000 kg. What is the mass of a car if the momentum of a truck is 20,000 kg m / s greater than that of a car
Truck impulse = 4000 * 72 / 3.6 = 80,000 kg * m / s (divided by 3.6 to convert to meters per second)
Means the impulse of the car 60,000
Then mass = 60,000 * 3.6 / 108 = 2000 kg
Answer: 2000 kg
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