A 2 kg body is sliding up an inclined plane of inclination 30 .find the work done by the force of gravity moving the body through 1 m.
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Work done = Fs cos 
= 2kg x 9.8 m/s2 x 1m x cos 30
= 19.6 x  3/2 (  cos 30 = 3/2 )
= 9.8  3 J
OBJ is the sign for division
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