Tuesday, 06 May 2014 13:38

## B2-36: EQUILIBRIUM OF TORQUES ON METERSTICK - ROTATORS

st

• ID Code: B2-36
• Purpose: Demonstrate equilibrium of torques
• Description:

Balance the meter stick ASYMMETRICALLY on the two rotators, and start the rotators in motion. Then balance the meter stick as close to SYMMETRICALLY as you can and start the rotators. It will always fall off if the rotators rotate outward, and will always end up balanced with the CM in the center if the rotators rotate inward. Which direction it moves depends on very small asymmetries!! Click the links below for several cases:

Try different starting points. Try adding a 100 gram weight onto either end. (Please ask for the weight so we do not overlook it.) It always works. Ask your students what they think will happen before doing the original experiment. Ask them again after adding a weight to one side.

• Availability: Available
• Loc codes: B2
Read 2208 times Last modified on Friday, 31 July 2020 16:23
• #### 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