A 2.0 kg mass slides down a frictionless inclined plane that makes an angle of 30 degrees with the horizontal. The sass starts from rest. What is its speed after it has slid a distance of 3.0 m along the incline? I got: F = (sin30)(9.8) F = 4.9 N W = Fd W = (4.9) (3) = 14.7 J W = E_kin 14.7 J = 1/2 mv^2 v = 1.21 m/s Is my method correct? I'm very unsure how to do this one. Thanks.