On a straight horizontal test track, driverless vehicles (with no passengers) are being tested. A car of mass $$\(1600 \mathrm{~kg}\)$$ is towing a trailer of mass $$\(700 \mathrm{~kg}\)$$ along the track. The brakes are applied, resulting in a deceleration of $$\(12 \mathrm{~m} \mathrm{~s}^{-2}\)$$. The braking force acts on the car only. In addition to the braking force there are constant resistance forces of $$\(600 \mathrm{~N}\)$$ on the car and of $$\(200 \mathrm{~N}\)$$ on the trailer. After the collision, the van starts to move with speed $$\(5 \mathrm{~m} \mathrm{~s}^{-1}\)$$ and the car and trailer continue moving in the same direction with speed $$\(2 \mathrm{~m} \mathrm{~s}^{-1}\)$$. Find the mass of the van. .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... ....................................................................................................................................................

Answer:

Knowledge points:

Solution: