A Block of Mass M Slides Down a Frictionless Plane

question 11

Multiple Choice

A block of mass M slides down a frictionless plane inclined at an angle θ with the horizontal. The normal reaction force exerted by the plane on the block is

• A) Mg.
• B) Mg sin θ.
• C) Mg cos θ.
• D) Mg tan θ.
• E) zero, since the plane is frictionless.

---

Definitions:

Heuristics

Mental shortcuts or rules of thumb that simplify decision making and problem-solving but do not guarantee optimal solutions.

Laboratory

A controlled setting equipped for scientific experiments, research, or teaching purposes.

Small Sample

A subgroup of a population selected for observation and analysis where the size of the group is considered statistically insufficient for conclusive results.

Misleading Results

Outcomes of experiments or studies that do not accurately reflect the true situation, often due to errors in design, methodology, or interpretation.