A 5.0kg ball is projected up along a plane that is inclined 20 degrees with the horizontal. What is its potential emergy when it moved 2.3m up along the plane?
The potential energy
"E_p=mgh=mgl\\sin\\theta\\\\\n=\\rm5.0\\: kg*9.8\\: m\/s^2*2.3\\: m*\\sin20^{\\circ}=38.5\\: J"
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