Calculating torque, force and angles

AI Thread Summary
To determine the force P applied at the end of a lever, the torque equation T = rFsinθ is utilized, where T is the moment (500 N.m), r is the lever length (1.8 m), and θ is the angle between the force vector and the lever. The calculation yields F = 500 / (1.8 * sin(15°)), resulting in a force of approximately 1073 N. It is important to note that the angle θ should be the interior angle between the force vector and the lever for accurate calculations. Clarification on the angle used is essential for confirming the result. Proper understanding of torque and angles is crucial for solving similar problems effectively.
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Homework Statement


A lever is used to lift a box, ignore the mass. the lever makes a 43° angle at the pivot, point A, the length of the lever is 1,8 m, Force P is apply 15° at the end of the lever
Force P causes a moment of 500N.m about point A. Determine the force P?

Homework Equations



T=rFsinθ

The Attempt at a Solution


T=rFsinθ
F=T/rsinθ
F=500/1.8sin15
F=1073N
 
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When using your formula for Torque, theta is the interior angle in between the force vector and the lever. Without a sketch, I don't know if you correctly determined theta. Welcome to PF!
 

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