A 10 kg mass starts from rest at the top of a frictionless incline and slides down the ramp. The ramp makes an angle of 0=30". Take the positive x axis to be down the ramp. What is the acceleration of the mass and it moves down the ramp? m a) a 0 - 4.9 m b) a=-4.9 - m S m c) a+4.9 - a, 0 2. 2 d) None of the above.