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A lever lifts a 200 N load with a 0.5 m load arm. The effort arm is 2 m. What effort is needed?
A25 N
B100 N
C800 N
D50 N
Answer & Solution
Correct answer: D. 50 N
Load x load arm = effort x effort arm, so effort = 200 x 0.5 / 2 = 50 N.
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