Isometimes get really confused during ap physics problems whether the sign of gravity is positive or negative. could someone give me a couple examples and an explanation that highlights the difference? i have read different previous answers but they just did not give a clear enough answer.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Disney, viacom and aol time warner are examples of

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?