A Block of Mass M Is Sliding Down a Rough $\theta$

question 10

Multiple Choice

A block of mass M is sliding down a rough inclined surface that makes an angle $\theta$ with respect to the horizontal. If the coefficient of static friction is $\mu$ _s and kinetic friction $\mu$ _k, then the acceleration of the block down the incline is equal to:

• A) "g sin \(\theta\) - \(\mu\) _s g cos \(\theta\)."
• B) " g cos\(\theta\) - \(\mu\) _k g cos \(\theta\)"
• C) "\(\mu\) _s g cos \(\theta\) -g sin \(\theta\)"
• D) "g sin \(\theta\) -\(\mu\) _k g cos \(\theta\)"
• E) "g sin \(\theta\)-\(\mu\) _s g cos \(\theta\) - \(\mu\) _k g cos \(\theta\)"

---

Definitions:

Null Hypothesis

The default position that there is no difference or effect in a population, used as a starting point for statistical testing.

F-ratio

A statistical value used in ANOVA tests to determine the ratio of variance between groups to variance within groups.

Null Hypothesis

A statement that asserts there is no significant difference or effect, which researchers aim to test against alternative hypotheses.

Analytical Comparison

The process of examining differences and similarities between entities or datasets to draw meaningful conclusions or insights.