A 30-Kg Crate Rests at the Bottom of a Plane Inclined

question 9

Multiple Choice

A 3.0-kg crate rests at the bottom of a plane inclined at an angle of 15.0 ^$\circ$ above the horizontal.The crate is given a push up the plane and when it has travelled a distance of 2.0 m up the plane its speed is 3.0 m/s.How much work is done on the crate by gravity?

• A)-15 J
• B)-60 J
• C)-30 J
• D)-45 J
• E)-10 J

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