Questions
A 2kg block is pulled upwards by 60N force. The ratio of magnitudes of total work done and work done against gravity after 3 seconds
detailed solution
Correct option is A
Net work done = Wf+Wg=Wf+WgW=F.S COS0+mgs cos 180 =60×12at2×1+2×10×12at2×(−1) =30×(60−202)×9−10×(60−202)×9∴a=F-mgm =20×402×9 =3600J Wg=10×20×9=1800J WWg=36001800=2Talk to our academic expert!
Similar Questions
If W1, W2 and W3 represent the work done in moving a particle from A to B along three different paths 1, 2 and 3 respectively (as shown) in the gravitational field of a point mass m, find the correct relation between W1, W2 and W3
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