Questions
The masses, each of mass m are kept on the vertices of an equilateral triangle of side a. Find the work needed to be done to change the length of each side of the triangle twice of its original value.
detailed solution
Correct option is C
By the work-energy theorem we can write thatWext+Wgr=Δ(K.E)=0⇒Wext=−Wgr=−(−ΔU)=ΔUWext=−3Gm22a−(−3Gm2a)=3Gm22aTalk to our academic expert!
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