Mass on a Ramp Free Body Diagram

physics simulation

Instructions: Use the slider to adjust the angle theta.
Explanation: For a mass on a frictionless ramp, there will be two forces acting. Gravity, and the Normal force. Gravity always is directed straight down and doesn't change magnitude, while the normal force will always be directed perpendicular to the surface of the ramp and its magnitude will be given by $$F_\textrm{N} = mg \cos \theta$$.

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mass on a ramp
free body diagram

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