Questions
The work done in bringing three particles each of mass 10gm from large distance to the vertices of an equilateral triangle of side 10cm is (approximately)
detailed solution
Correct option is B
m=10g=10×10-3kg=10-2kg r=10cm=10×10-2m=10-1m W=−ΔU=-Uf-Ui=-Uf-0(∵Potential energy at inifinity =0 for all the three particles) Wnet=-Uf1+Uf2+Uf3=-2U=−−3Gm1m2r=3Gm2r=3×6.67×10-11×10-2210-1=20.01×10-14J=2×10-13JTalk to our academic expert!
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A shell of mass M and radius R has a point mass m placed at a distance r from its centre. The gravitational potential energy U (r) vs r will be
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