Recent content by cwong24

  1. C

    What Force Prevents a Skater from Rolling Down an Incline?

    I can get answer B if I only calculate the y component of the Weight force. But that leaves the x component of the Weight force unaccounted for. Can the x component just not contribute to keeping the mass on the incline? (I drew a FBD as I understand you are saying)
  2. C

    What Force Prevents a Skater from Rolling Down an Incline?

    OK if there is no friction, I don't know if there is or not since the problem did not say there is or not. The portion of the Weight force directed down the incline would be sin 15* W. Since the skater isn't moving, then the force that must be overcome to get this mass rolling should be equal...
  3. C

    What Force Prevents a Skater from Rolling Down an Incline?

    Homework Statement A skateboarder + skateboard has a combined mass of 70 kg. How much force is required to prevent them from rolling down a 15 degree incline? Homework Equations Weight = 70kg * 9.81m/s^2 Normal = cos 15 * W Friction = sin 15 * W The Attempt at a Solution I...