The first of two identical boxes of mass m is sitting on level ground. The second box is sitting on a ramp that makes an angle with the ground. When a force of magnitude F is applied to each box in a direction parallel to the surface it is on, upwards on the box on the ramp, neither box moves. Which statement comparing the friction force on the box on the level, Fs,L, to the friction force on the box on the ramp, Fs,R, is correct?
A. Fs,R = Fs,L.
B. Fs,R>Fs,L.
C. Fs,R
Answer: E
Physics & Space Science
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