The course and, consequently, the tests emphasize problem solving. In order to solve problems one needs to master the underlying concepts and principles. This guide points out some of the basic terms, concepts, principles or laws. In addition, please review sample problems in you notes and do the homework assigned on eGrade. You have to understand and use the physics principles when you do problems. The plugging numbers into formulas without understanding the underlying physics concepts and principles leads to disasters not only on tests but also in real life.
Visit this website. It shows the parallel between linear and angular motion as well as the derivation of moments of inertia for some common geometric objects such as a solid sphere, cylinder etc.
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Be able to use the equations of motion for constant angular acceleration listed in table 8-1and table 9.2 (page 229 and P. 239). |
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Be able to relate linear (tangential) and angular variables (Section 8-4) |
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Be able to calculate the moment of inertia for a system of particles or rigid bodies rotating around an axis passing through their CM or any axis parallel to it. |
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Be familiar with moment of inertia for various massive rigid object (SeeTable 9-1) and be able to use the parallel axis theorem to convert Icm to Iparallel ( See example problem 9-9 p.263). Be able to wisely use the information inn Table 9.1 along with the parallel axis theorem. You will be given this info for use in your test. |
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Be able to incorporate rotational Kinetic Energy when objects roll. See example problem 9-13 p. 271. |
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Be able to calculate torque ( T =r x F) angular momentum (L = r x p or L= Iw) as a vector products and figure out directions of of T and L using the right hand rule. |
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Be
familiar with Newton's 2nd law for rotation. See equation9-7 p. 262 and
example 10 p.264 |
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Be
able to relate torque and angular momentum as well as torque and angular
acceleration |
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Be
able to state and apply the conservation of L in solving
problems and explain: Why a spinning wheel does not fall; Why a
gyroscope or a spinning top maintains its direction.; Why skaters spin
faster when their arms in. Why pulsars spin faster than stars. Why a
helicopter needs a rear rotor etc. |
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Be
able to explain that Kepler's 2nd Law of planetary motion (The
Law of Equal Areas) is a consequence of the conservation of L. See page 274 |
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Be able to explain and do calculations related to demos with the rotating stool and weights that will be done in class. |
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Be able to use conservation of energy when both transitional and rotational kinetic energies are present. |