A 3 N weight slides down a ramp made of sandpaper. The coefficient of friction is 0.8, and the ramp is at an angle of 50° to the horizontal. How could you calculate the magnitude of the friction force?
A. 3 N × sin(50°)
B. 3 N × 0.8 × 50°
C. 3 N × 0.8 × sin(50°)
D. 3 N × 0.8 × cos(50°)
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