Map sapling earning A homeowner is trying to move a stubborn rock from his yard

Question

Map sapling earning A homeowner is trying to move a stubborn rock from his yard which has a mass of 525 kg. By using a lever arm (a piece of metal rod) and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum d 0.277 m from the rock so that one end of the rod fits under the rock's center of weight. If the homeowner can apply a maximum force of 639 N at the other end of the rod, what is the minimum total length L of the rod required to move the rock? Assume that the rod is massless and nearly horizontal so that the weight of the rock and homeowner's force are both essentially vertical. Number Im

Explanation / Answer

Here ,

let the distance is L1

m = 525 Kg

d = 0.277 m

Balancing the forces

mg * d - F * L1 = 0

525 * 9.8 * 0.277 - 639 * L1 = 0

L1 = 2.23 m

total minimum length = 2.23 + 0.277

total minimum length = 2.51 m

the total minimum length is 2.51 m

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