Question: A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but, as they walk away, it begins to roll down the ramp. If the back of the truck is 2.91 m above the ground and the ramp is inclined at 13.97o,
Part A: How much time do the workers have to get to the piano before it reaches the bottom of the ramp?
Please explain your answer. I know substitution is involved so be sure to give a detailed explanation on that as well.