Study Tips for Exam 2
Exam is closed books, closed notes, no collaboration.
NOTE: You many not use the textbook or photocopies of any portion of the textbook during the exam.
Exam 2 will test your knowledge of the topics covered
since Exam 1:
Applications
of
Equilibrium Problems (e.g. block hanging by two chains)
Friction (static, kinetic, rolling, air resistance)
Elastic Forces (e.g. F = -kx)
Circular
Motion and Gravitation
Acceleration of an object in circular motion (a = v2/r inward)
Understanding universal law of gravity (F = - GMm/r2)
Acceleration of due gravity (g = GM/r2)
Calculation of orbital velocity (Use r = (radius of Earth) + (height above Earth)!)
Calculation of orbital period
Work and
Energy
Definition of work (W = Fxcosθ)
Definition of kinetic energy (EK = mv2/2)
Definition of potential energy (EP formula depends on system)
Conservation
of Energy (EP + EK
= ETotal)
Energy is conserved (ETotal is constant ) in systems without friction
Potential energy is converted to kinetic energy as system moves(and vice versa)
Total energy of a system decrease when system does work, increase when work done on system
Definition of Power (P = ΔE/Δt, where ΔE is change in energy, i.e. work done or received, by system in time Δt)
Inelastic Collision: Kinetic energy not conserved
Elastic Collision: Kinetic energy conserved
Momentum
Definition of momentum (P = mv)
Conserved in both elastic and inelastic collisions
Definition of Impulse (FΔt = Δp)
Sample problems:
Applications of Newton’s Laws
Example 5.2. p. 131
Example 5.8 p. 141
Example 5.9 p. 142
Example 5.11 p. 143
Circular Motion and Gravitation
Example 6.1 p. 164
Example 6.3 p. 166
Example 6.7 p. 172
Example 6.10 p. 177
Work and Energy
Example 7.2 p. 195
Example 7.10 p. 211
Example 7.11 p. 212
Example 7.12 p. 213
Example 7.16 p. 217
Momentum
Example 8.2 p. 236
Example 8.3 p.237