A 400-Kg Block Rests on a 30

question 48

Multiple Choice

A 4.00-kg block rests on a 30.0° incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline?

• A) 34.0 N
• B) 51.1 N
• C) 54.7 N
• D) 84.0 N
• E) 76.4 N

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Definitions:

Bone Spur

A bony growth formed on normal bone, often due to aging or as a response to friction or pressure.

Fluid

A substance that has no fixed shape and yields easily to external pressure; can be a gas or a liquid.

Genu Valgum

A condition characterized by an inward curvature of the legs, commonly known as "knock-knees."

Knock Knees

A condition where the knees angle in and touch when the legs are straightened, often noticeable when standing.