A Block Is First Placed on Its Long Side and Then

question 20

Multiple Choice

A block is first placed on its long side and then on its short side on the same inclined plane. The block slides down the plane on its short side but remains at rest on its long side. A possible explanation is:

• A) the short side is smoother
• B) the frictional force is less because the contact area is less
• C) the center of gravity is higher in the second case
• D) the normal force is less in the second case
• E) the force of gravity is more nearly down the plane in the second case

---

Definitions:

Broadest Possible

Referring to the widest or most comprehensive scope or extent.

Meteorological Phenomenon

An observable event that is explained by the science of meteorology, such as storms, tornadoes, and rainfall.

Spectrum

A range of different positions, opinions, or conditions, often seen as a continuous series.

Rainbow

An optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when sunlight is dispersed through water droplets in the atmosphere.