Electricity: Static Electricity
Static Electricity: Audio Guided Solution
Problem Set SE7, Question 2:
Two bowling balls with a mass of 7.25 kg are positioned in a vertical cylinder such that they fit one above the other. What quantity of charge must the two bowling balls have such that the electrical force of repulsion causes the top ball to levitate above the bottom ball such that their nearest surfaces are distanced 25 cm apart? The diameter of a bowling ball is 21.8 cm. Assume the bowling balls have an identical charge.
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...
- ... reads the problem carefully and develops a mental picture of the physical situation. If necessary, sketches a simple diagram of the physical situation to help visualize it.
- ... identifies the known and unknown quantities; records them in an organized manner. A diagram is a great place to record such information. Equates given values to the symbols used to represent the corresponding quantity - e.g., Q1 = 2.4 μC; Q2 = 3.8 μC; d = 1.8 m; Felect = ???.
- ... uses physics formulas and conceptual reasoning to plot a strategy to solve 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 Static Electricity at The Physics Classroom Tutorial.
Watch It!
Try our YouTube video on the topic of ...