Can you help me answer these 3 questions please.

2. *#*In the figure, determine the character of the collision. The masses of the blocks, and the velocities before and after, are shown. a. Is momentum conserved? b. Does it represent an elastic or inelastic collision? You must perform a calculation and show all your work. 1.8 m/s 0.2 m/s 0.6 m/s 1.4 m/S 4 kg 6 kg 4 kg 6 kg Before After 3. ***A block of mass m = 5.6 kg, moving on a frictionless surface with a velocity of vi = 6.5 m/s to the right, collides with a block of mass Mat rest, as shown in the figure. After the collision, the 5.6-kg block recoils with a velocity of of = 0.70 m/s to the left. If the blocks are in contact for 0.20 s, what is the magnitude of the average force on the 5.6-kg block, while the two blocks are in contact? M M before after 4. ***A 1500-kg car traveling at 90 km/h toward the east suddenly collides with a 3000-kg car traveling at 60 km/h toward the south. The two cars stick together after the collision. What is the speed and direction of motion of the cars after collision? How much energy is lost as heat