A car weighing 990 kg moves at a speed of 65 km / h, then its speed dropped to 25 km / h.
| September 2, 2021 | education
A car weighing 990 kg moves at a speed of 65 km / h, then its speed dropped to 25 km / h. calculate the initial and final impulse of the vehicle.
Task data: m (vehicle weight) = 990 kg; V1 (initial speed) = 65 km / h (18.06 m / s); V2 (vehicle final speed) = 25 km / h (6.94 m / s).
1) Initial impulse of the car: P1 = m * V1 = 990 * 18.06 = 17879.4 kg * m / s.
2) Final impulse of the car: P2 = m * V2 = 990 * 6.94 = 6870.6 kg * m / s.
Answer: The momentum of the car before the decrease in speed was 17879.4 kg * m / s, and after the decrease in speed it became equal to 6870.6 kg * m / s.
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