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a$)$ gravity only

b$)$ gravity and the tension in the rope

c$)$ gravity, the tension in the rope, the normal force, and the net force

d$)$ gravity, the tension in the rope, and the normal force

Question $18($Mandatory$)(1$ point$)$

A bicycle and rider enter a downhill part of the road that makes an angle of $15$ with the horizontal. If all forces of friction may be neglected, what is the acceleration as the bicycle coasts down the hill?

a$)0\mathrm{.}85\frac{m}{s^2}$

b$)9\mathrm{.}8\frac{m}{s^2}$

c$)0\frac{m}{s^2}$

d$)9\mathrm{.}5\frac{m}{s^2}$