Questions
In the figure, a person wants to raise a block lying on the ground to a height h. In both the cases, if the time required is same, then in which case he has to exert more force? Assume pulleys and strings light.
detailed solution
Correct option is A
Since, h=12at2,a should be same in both cases, because h and t are same in both cases as given. In Fig. (a), F1−mg=ma⇒F1=mg+ma In Fig. (b), 2F2−mg=ma ⇒ F2=mg+ma2∴ F1>F2Talk to our academic expert!
Similar Questions
For the system shown in figure, the pulleys are light and frictionless. The tension in the string will be
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