A 10kg crate rests on a frictionless 30∘ incline. It is held stationary by a light rope that runs parallel to the surface of the incline and is attached to the crate uphill. What is the magnitude of the tension in the rope? (Use g=9.8m/s2.)
a) 8.5×101N
b) 5.0×101N
c) 4.9×101N
d) 9.8×101N