physicslabweek1and2spring.doc - Physics lab 1 Spring quarter ROTATIONAL DYNAMICS Objectives Study the relationship between force lever arm and torque

# physicslabweek1and2spring.doc - Physics lab 1 Spring...

This preview shows page 1 - 3 out of 4 pages.

Physics lab # 1. Spring quarter.ROTATIONAL DYNAMICSObjectivesStudy the relationship between force, lever arm, and torque; study how torques addStudy the conditions for static equilibrium of a rigid bodyStudy the concept of “center of gravity”PART A. Static Equilibrium of Rigid Bodies: The Roman balanceIntroduction The torque created by a force F with respect to a certain axis of rotation is= F xdwhere dis the lever arm, which is the perpendicular (shortest) distance between the axis of rotation and the line of force. Static Equilibrium: In order for a rigid body to stay in equilibrium, the net force and the net torque on the object must both be zero. We usually only deal with motion of objects in two dimensions, in which case the conditions for static equilibrium areFx = 0, Fy = 0, = 0Center of Gravity: For a rigid body with finite size, the force of gravity acts on all parts of the body. But for the purpose of studying the translational motion of the body as a whole or the static equilibrium of the body, we can assume that the entire weight of the body acts at a single point. This point is the center of gravity. When we draw the force diagram for a rigid body, we can put a single force of gravity at the center of gravity.Experimental SetupEquipment: torque apparatus, hangers, weightsThe apparatus consists of a meter stick suspended from a fulcrum. Weights may be hung from the meter stick at various positions along the stick by means of hangers in order to apply torques.A steelyard balanceis a straight-beam balance with arms of unequal length. It incorporates a counterweight which slides along the calibrated longer arm to counterbalance the load and indicate its weight. A steelyard is also known as a steel-yard, steel yard, common steelyard, Roman steelyard, or Roman balance.
A 19th-century steelyard.

#### You've reached the end of your free preview.

Want to read all 4 pages?

• Spring '17

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern