Mechanics: Circular Motion and Gravitation
Circular Motion and Gravitation: Audio Guided Solution
Extra Problem 11:
A 2.53-gram penny is on a turntable. It starts from rest at a radius of 2.22 meters. The turntable accelerates to a speed of 2.84 m/s, at which time the penny slides off the turntable. What coefficient of static friction exists between the penny and the turntable if the penny doesn't fly off until it reaches this speed?
Audio Guided Solution
Habits of an Effective Problem Solver
An effective problem solver by habit approaches a physics problem in a manner that reflects a collection of disciplined habits. An effective problem-solver...
- ... eads the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- ... identifies the known and unknown quantities in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., m = 61.7 kg, v= 18.5 m/s, R = 30.9 m, Fnorm = ???.
- ... uses physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- ... identifies the appropriate formula(s) to use.
- ... performs substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Circular Motion and Gravitation at The Physics Classroom Tutorial.
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