Questions
Two plates whose masses are m1 and m2 respectively are connected by a massless spring as shown in figure. What minimum force should be applied to the upper plate for it to lift the lower one after the force is removed.
detailed solution
Correct option is A
The lower plate will rise if spring force on it greater than its weight Kx2>m2g suppose it is compressed by x1;12Kx12=12Kx22+m1gx1+x2Hence x1>2m1Kg+m2gK F+m1g=Kx1F>m1+m2gTalk to our academic expert!
Similar Questions
Two similar springs P and Q have spring constants such that Kp > . They are stretched first by the same amount (case a), then by the same force (case b). The work done by the springs are related as, in case (a) and case (b), respectively.
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