Pole Hinge Support
Pole Hinge Support
Physics-Please Help! Urgent!? Answers?
Lighting of 20.0 kg in a park is supported by the end a horizontal beam of the mass negligeble is hinged to a pole. A cable at an angle of 30 degrees with a light beam can support. Find (a) the tension in the cable and (b) veritical beamm horizontal forces exerted on the pole Pls .. how! Answers: a) 392N b) H: 339N (at right) V: 0
In this case, you affect the balance of torque. What is the sum of all pairs = 0 To calculate torque, you need an axis of rotation. We choose the pivot point, because then the forces acting through the hinge pairs do not apply (you can not open a door pushing on the hinge). Torq now = force x-axis distance x sin (angle Betwen a) two forces that produce pairs in the first weight beam reflector acts to down, but at a distance L, for T1 = - LMgsin (90) =- LMG, which tends to rotate clockwise beam, we call the other negative is the pair cable tension T LTsin = t2 + (30) = + LT / 2, we have LT / 2-LMG = 0 for T = 2 mg or 40kgg To answer the next time the sum of forces X and Y is the sum of 0 Fax: + (30 pm - TCOS) = 0 The sum of F: V-Mg + Tsin (30) = 0 to solve for V and H. .
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