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Rotation will not begin or change if theĪpplied torques are balanced (if the system is in rotational equilibrium). Torques cause counterclockwise rotational motion. Clockwise torques produce clockwise rotational motion and counterclockwise
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ForĬonvenience, torques are designated by the circular directions of motion that they tend toĪ rigid body can rotate about a specific axis in only two directions, clockwise or counterclockwise. When youĬross r into F using the right-hand rule, your thumb points in the direction of the torque. Its direction is normal to the plane containing r and F. With the unit of work (1 newton-meter = 1 joule). The measurement unit for torque is the newton-meter (Nm), which you should not confuse Therefore, the magnitude of the torque is Torque is defined as the vector product of the force and the Some axis of rotation (also called moment of force) results from a force being exerted at a Explain how a laboratory balance measures massĪ rigid body in static equilibrium must necessarily be in rotational equilibrium. Describe mechanical equilibrium of a rigid objectģ. Situations, you will experimentally verify the two equilibrium equations. Measuring the forces and calculating the torques acting on this meter stick in different The rigid object will be an ordinary wooden meter stick. In this experiment, you will examine torques, rotational equilibrium, and center of mass as The object about its center of mass, we can determine the complex motion of any extended Motion of an object’s center of mass (the motion of a point mass), and the rotational motion of The concept of center of mass is what allows us to study the motion and equilibrium ofĮxtended (real world) objects as if they were point objects. To be in static equilibrium, a rigid object must also be in The vector sum of all the torques about an arbitrary axis must be zero. The vector sum of all the external forces acting on it must be zero. Two conditions must be met for a rigid object subject to a combination of external forces toġ. Theĭesigner needs to identify all the forces and torques that act on a structural element, and toĮnsure through design and materials selection that the element will safely tolerate the loads to The staticĮquilibrium condition is very important in civil engineering, applying to bridges, dams,īuildings, statues, and balconies, and in our daily lives, applying to our ability to stand up, toĭrive around corners without overturning, and to slide a stein of beer the length of the barĪnalyzing static equilibrium conditions is an essential part of architectural engineering. In this experiment, you will investigate truly rigid bodies and static equilibrium. What has changed? Only the chair’s shape. But if anĮlephant sits on the chair, it will most definitely be in equilibrium with all four legs resting It sits on the floor? If, as often happens, one of its legs is a bit short, it will not be inĮquilibrium instead, it will wobble about the two diagonally-opposite longer legs. In this experiment, you will investigate torques on rigid bodies and static equilibrium.Ĭonsider, for example, an ordinary chair. University Physics, Exp 9: Torque, Equilibrium & Center of Gravity Produced by the Physics Staff at Collin CollegeĬopyright © Collin College Physics Department. PHYS 2425 Collin College Torque Equilibrium & Center of Gravity Report PHYS 2425 Collin College Torque Equilibrium & Center of Gravity Report Physics Homework Solution