A trolley of mass 1kg is moving at 2ms(-1).It collides with a stationary trolley of mass 2kg. This second trolley moves off at 1.2ms(-1). a) Draw before and after diagrams to show the situations
b) use the principle of conservation of momentum to calculate the speed of the first trolley after the collision. in what direction does it move?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?