A Block Is at Rest on a Wooden Ramp

question 13

Multiple Choice

A block is at rest on a wooden ramp. The coefficient of static friction between the block and ramp is 0.35. If the ramp is gradually elevated on one side, at what angle (between the ramp and the horizontal) will the block first begin to slide?

• A) 17°
• B) 19°
• C) 29°
• D) 20°
• E) 22°

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