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 \(\theta\)"

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