Question

question 9 of 10
dale skis down a hill with a slope of 30°. given that there is friction acting between his skis and the snow as he moves, which of the following is the correct free - body diagram for dale?

Explanation:

• Weight force: The weight force (\(mg\)) always acts vertically downwards.
• Normal force: The normal force (\(N\)) acts perpendicular to the surface of the hill.
• Friction force: Since Dale is moving down the hill, the friction force (\(f\)) acts opposite to the direction of motion, i.e., up the hill.

Looking at the options:

• In option A, the weight force is not vertical - incorrect.
• In option B, the weight force is vertical, normal force is perpendicular to the hill, and friction is up the hill - correct.
• In option C, the normal force and weight force directions are not as per the hill - slope geometry (normal force should be perpendicular to the hill surface) - incorrect.
• In option D, the normal force and weight force directions are not as per the hill - slope geometry (normal force should be perpendicular to the hill surface) - incorrect.

Answer:

B. B