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What this chapter covers:
Type A: Inclined Plane Problems
Type B: Static Equilibrium Problems
Problem:
Given:
Answer:
❌ Mistake 1: Forgetting to resolve forces into components.
❌ Mistake 2: Incorrectly calculating the normal force.
When dealing with inclined planes, rotate your coordinate system so that the x-axis is parallel to the plane. This simplifies the force analysis.
What this chapter covers:
Type A: Work Done by Friction
Type B: Conservation of Energy Problems
Problem:
Given:
Answer:
❌ Mistake 1: Forgetting the negative sign for work done by friction.
❌ Mistake 2: Not accounting for all forms of energy in conservation of energy problems.
When using conservation of energy, choose your zero level for potential energy wisely to simplify calculations.
What this chapter covers:
Type A: Calculating Buoyant Force
Type B: Determining Floating or Sinking
Problem:
Given:
Answer:
❌ Mistake 1: Using the object's volume instead of the displaced fluid's volume when calculating buoyant force.
❌ Mistake 2: Confusing density and weight.
When dealing with buoyancy problems, always start by drawing a free-body diagram showing the weight and buoyant force acting on the object.