How much work would be done by an external agent to bring two planets (each with a mass of 1x10^20 kg) to a separation distance of 3.0x10^10 m (center to center)

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?