Question

alex slides down a hill with a coefficient of kinetic friction of 0.4. what is the free - body diagram for alex as he slides?
a. a
b. b
c. c
d. d

Explanation:

When Alex slides down a hill, the forces acting on him are:

• Weight: Acts vertically downward (due to gravity).
• Normal force: Acts perpendicular to the surface of the hill (as it is the contact force from the hill on Alex).
• Kinetic friction: Acts opposite to the direction of motion (so up - the - hill as Alex is sliding down).

Looking at the options:

• In option A, the weight is not vertical.
• In option B, the normal force is not perpendicular to the surface.
• In option C, the weight is vertical, the normal force is perpendicular to the surface, and the friction is opposite to the direction of motion.
• In option D, the normal force is not perpendicular to the surface.

Answer:

C. C