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 (g=10ms−2)

Vet work done =Wf+Wg=Wf+WgW=F.SCOS0+mgs⁡cos⁡180=60×12at2×1+2×10×12at2×(−1)∵a=F-mgm=30×60−202×9−10×60−202×9=20×402×9=3600JWg=10×20×9=1800JWWg=36001800=2