Question

You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father. Which plank will give you the most mechanical advantage? Calculate the MA for each plank

Answer 1

8 foot plank

Step-by-step explanation:

8-foot plank would be straighter, so you could easily push it up, unlike the 3 foot plant.

Answer 2

the 8 foot plank

Step-by-step explanation:

The 3 foot plank would be steeper so it would make the rock heavier than it already is so if you use an 8 foot plank it would be straighter and not as steep