Which lighting direction is used to create silhouettes?

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?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?