The potential energy of a particle falling through a straight shaft d – McqOptions

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1.	The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to (where r is the distance of’the particle from centre of the earth)
A.	log r
B.	r
C.	r2
D.	1/r
Answer» D. 1/r

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