Two identical 1350-kg automobiles A and B are at rest with their brakes released when B is struck by a 5400-kg truck C that is moving to the left at 8 km/h. A second collision then occurs when B strikes A. Assuming the first collision is perfectly plastic and the second collision is perfectly elastic, determine the velocities of the three vehicles just after the second colli

A railroad car having a mass of 15000 kg is coasting at 1.5 m/s on a horizontal track. At the same time another car having a mass of 12000 kg is coasting at 0.75 m/s in the opposite direction. If the cars meet and couple together, determine the speed of both cars just after the coupling.

Car 1 has a mass of 1.50 x 10' kg and is moving at a constant speed of 4.00 m/s. It strikes Car 2, which is at rest and has a mass of 1.20 x 10 kg. The cars lock together and continue to roll forward. They then collide and lock together with Car 3, which is at rest and has a mass of 1.80 x 10' kg. Before First Collision Car 1 Car 2 Car 3 = 4.00 m/s 15 =0 m/s =0 m/s Immediately After First Collision Car 1 Car 2 Car 3 V12 Immediately After Second Collision Car 1 Car 2 Car 3 O D) V123 Note: Vector arrows are not drawn to scale. Numerical Response The maximum speed of this three-car system, v23, immediately after the second collision is m/s.

Box A is traveling down the smooth incline (0= 17°) and it hits box B, initially at rest, with the velocity of 5 m. Immediately after impact, box A moves up the incline with the velocity of 1 m. Determine the velocity of box B (in m) immediately after impact. Consider ma = 3 kg and mB = 18 kg. The positive direction is shown on the figure. VA В