A Block of Mass M Is at Rest on an Inclined

question 16

Multiple Choice

A block of mass m is at rest on an inclined plane that makes an angle of 30º with the horizontal, as shown in the figure. Which of the following statements about the force of static friction is true?

• A) f_s > mg
• B) f_s > mg cos 30º
• C) f_s = mg cos 30º
• D) f_s = mg sin 30º
• E) None of these statements is true.

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