A skateboarder rolls from rest down an inclined ramp that is 15.0 m long and inclined above the horizontal at an angle of θ = 20.0°. When she reaches the bottom of the ramp 3.00 s later her speed is 10.0 m/s. Show that the average acceleration of the skateboarder is g sin θ, where g = 9.81 m/s2.
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