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Please provide work and explanations!

Example 13.4.2 Sample Problem Work done by a gravitational force Two stationary particles with mass m = 3.00 x 10-13 kg and m

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Answer #1

given
m1 = 3*10^-13 kg
m2 = 5*10^-13 kg
ri = 2.6*10^-3 m
rf = 2*r1

= 2*2.6*10^-3

= 5.2*10^-3 m


Question 2)

Workdone by us, W_us = Uf - Ui

= -G*m1*m2/rf - (-G*m1*m2/rf)

= -6.67*10^-11*3*10^-13*5*10^-13/(5.2*10^-3) - (-6.67*10^-11*3*10^-13*5*10^-13/(2.6*10^-3))

= 1.92*10^-33 J <<<<<<<-----Answer

Question 3)

Workdone by gravitational force,

W = Ui - Uf

= -6.67*10^-11*3*10^-13*5*10^-13/(2.6*10^-3)- (-6.67*10^-11*3*10^-13*5*10^-13/(5.2*10^-3) )

= -1.92*10^-33 J <<<<<<<-----Answer

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