Mechanics: Circular Motion and Gravitation
Circular Motion and Gravitation: Audio Guided Solution
Extra Problem 14:
A 655-kg roller coaster car starts from the top of a hill and rolls down. It enters a loop for which the radius at the top is 7.57 meters. Determine the minimum speed in meters/second (at the loop's top) at which the 655 kg roller coaster car will complete the loop without falling out of the loop. (HINT: This is the speed at which the roller coaster car wheels are just barely in contact with the track; any slower speed would turn the car into a projectile.)
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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