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hiiii,could someone help me with these qns?? 1)in selina pg 46,qn 6 The bob of a simple pendulum is imparted a velocity of 5m/s when it is at its mean position.To what max vertical ht will it rise on reaching at its extreme position if 60% of its energy is lost in overcoming the friction of air??(Answer 0.75m) plzz explain how to solve it. 2)pg;67 qn 2: A fixed pulley is driven by a 100kg mass falling at a rate of 8.0m in 4s.It lifts a load of 75kgf.calc: (a)the power input (b)efficiency (c)ht to which the load is raised in 4s. I did the first part but dont know how to do the rest.Plzz help.... 3)in selina,there are no experiments given for calorimetry.Then should I learn that??? plzz answer asap............ |
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| asked by Snigdha (silver2002) 8 years ago | |
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