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physics

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Find the acceleration down the ramp:
skateboarder starts from rest at the top of a 12.5 m slick ramp that makes a 25 degree angle with the horizontal. (coefficient of rolling friction is negligible). Combined mass of skateboarder and skateboard = 75 kg.

  • physics - ,

    Net force down= mass*a
    mg*SinTheta=m*a solve for a.
    If you had friction, it would be like this:
    mg*sinTheta-mu*mg*CosTheta=ma

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