A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum a distance d = 0.244 m from the rock, which has a mass of 365 kg, and fits one end of the rod under the rock's center of weight.

Physics for Scientists and Engineers: Foundations and Connections
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ISBN:9781133939146
Author:Katz, Debora M.
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Chapter12: Rotation I: Kinematics And Dynamics
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A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot
point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum a distance d
= 0.244 m
from the rock, which has a mass of 365 kg, and fits one end of the rod under the rock's center of weight.
If the homeowner can apply a maximum force of 695 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. The acceleration due to gravity is g = 9.81 m/s?.
%3D
L =
Transcribed Image Text:A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum a distance d = 0.244 m from the rock, which has a mass of 365 kg, and fits one end of the rod under the rock's center of weight. If the homeowner can apply a maximum force of 695 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. The acceleration due to gravity is g = 9.81 m/s?. %3D L =
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