Reflective Mental Overseer Questions:
- What numerical values are stated explicitly in the body of the question ?
Example:
"Starting from rest an object..." is a explicit statement that the initial velocity of the object is zero. Expressed mathematically, vo = 0.
- What information is implied by this type of question but is not explicitly stated ?
Example::
In free-fall problems, it is often assumed that the effects of air resistance are small and can be neglected. Expressed mathematically, this means that the acceleration of the object is equal to g = 9.80 m/s2, downdards.
- How will I label the quantities given ?
Action:
Select labels for the quantities given and write down their values. These labels can be any personal tags you choose.
Examples: vo= 12.0 m/s, EA= 145 kJ, mboy= 34.0 kg
When applicable, place the knowns (symbol = value) on the sketch of the process at the appropriate location.
Example:
If a station wagon travels at a speed of 25.0 m/s, how far can it travel in 11.0 minutes ?
Although not explicitly stated, it is reasonable to assume that the automobile is moving at a constant speed in this problem.
Comment:
- Except in the simplest of problems, the personal labels you use will not necessarly be the same as the generic labels used in the equations found in the textbook.
- It is important to keep track of the meaning of each symbol you use, how it is connected to those used in the textbook, and how it is connected with the physical quantities described in the problem.