A roofing shingle elevator is lifting a 30.0-kg package to the top of a building at constant speed. The angle between the elevat
or track and the horizontal is 75∘. The power of the elevator is 800 W. Part A Determine the vertical component of the speed with which the package is moving up. Assume no friction is exerted by the incline surface on the package.
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The horizontal velocity was constant, so:
it traveled 90meters