Tuesday, 06 May 2014 13:33

## B2-34: EQUILIBRIUM OF TORQUES - ANGLE BRACKET

• ID Code: B2-34
• Purpose: Verify the equation for torques when the center of mass is outside the object
• Description:

A bracket is bent into a right triangle with arms of length a and 2a, and suspended from the end of the small arm as photographed. What is the angle of repose r of the small arm with the vertical, at equilibrium?

From the equation of torques, w1 x1 = w2 x2,

where: w1= mg and x1= a/2 sin r,

also: w2 = 2mg and x2 = a cos r - a sin r)

From these, tan r = 4/5, and r = 38.66 degrees.

• Availability: Available
• Loc codes: B2
• #### B2-01: SUM OF FORCES IN A LINE Demonstrate that forces in one dimension add algebraically Read More
• #### B2-02: SUM OF FORCES - SPRING SCALES Show that the sum of forces exerted on the mass by the scales is constant Read More
• #### B2-03: EQUILIBRIUM OF FORCES - INCLINED PLANE Demonstrate equilibrium of forces Read More
• #### B2-04: VERTICAL FORCES - FOUR SPRING SCALES Show addition of forces along a line Read More
• #### B2-11: EQUILIBRIUM OF FORCES - OHAUS PROJECTION Demonstrate equilibrium of forces Read More
• #### B2-12: EQUILIBRIUM OF FORCES - BOARD BACKGROUND Demonstrate equilibrium of forces Read More
• #### B2-14: SUM OF FORCES - LARGE ROPE VERSION Develop a feel for equilibrium of forces on a large scale Read More
• #### B2-16: VECTOR ADDITION WITH ROPE AND STUDENTS Demonstrate vector addition of forces Read More
• #### B2-21: CONCEPT OF TORQUE - TORSIONAL CHAIR Introduce the concept of torque Read More
• #### B2-22: TORQUE - PHYSICAL DEFINITION Introduce the concept of torque Read More
• #### B2-23: TORQUE CONDITION FOR EQUILIBRIUM Demonstrate that equilibrium of forces is an insufficient condition for static equilibrium Read More
• #### B2-31: EQUILIBRIUM OF TORQUES - WHEELS AND AXLES Demonstrate equilibrium of torques Read More
• #### B2-32 EQUILIBRIUM OF TORQUES - LARGE Demonstrate balanced torques Read More
• #### B2-33: EQUILIBRIUM OF TORQUES - SMALL Demonstrate balanced torques Read More
• #### B2-34: EQUILIBRIUM OF TORQUES - ANGLE BRACKET Verify the equation for torques when the center of mass is outside the object Read More
• #### B2-35: EQUILIBRIUM OF TORQUES ON METERSTICK Demonstrate equilibrium of torques Read More
• #### B2-36: EQUILIBRIUM OF TORQUES ON METERSTICK - ROTATORS Demonstrate equilibrium of torques Read More
• #### B2-41: ROBERVAL BALANCE Demonstrate a paradox in equilibrium of forces and torques Read More
• #### B2-42: ARM MODEL Model the forces occurring in the arm Read More
• #### B2-43: CRANE BOOM Demonstrate a crane boom Read More
• 1