A train is moving at 17 m/s and has a mass of 2564 kg. A broken down car (loaded with heavy bricks) is stopped on the train track. Upon impact, the train and car get tangled together and travel at a constant velocity of 4 m/s.

What is the mass of the broken down car?
i got 8333kg

The procedure is the same as your previous post except the unknown will be M2 1nstead

of the velocity.

To determine the mass of the broken down car, we can use the principle of conservation of momentum.

The momentum of an object is calculated by multiplying its mass by its velocity. The total momentum before the collision is equal to the total momentum after the collision, assuming no external forces are acting on the system. Mathematically, we can express this as:

(mass of the train × velocity of the train before the collision) = (mass of the train + mass of the car) × (velocity of the train and car after the collision)

Let's substitute the given values into the equation:

(2564 kg × 17 m/s) = (2564 kg + mass of the car) × 4 m/s

Now, we can solve for the mass of the car.

43528 kg·m/s = (2564 kg + mass of the car) × 4 m/s

Dividing both sides of the equation by 4 m/s:

10882 kg = 2564 kg + mass of the car

Subtracting 2564 kg from both sides of the equation:

mass of the car = 10882 kg - 2564 kg
mass of the car = 8328 kg

Therefore, the mass of the broken down car is approximately 8328 kg. It seems there was a slight calculation error in your answer; the correct mass is 8328 kg, not 8333 kg.