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52%D Tue Jan 10 9:08 PM a E Safari File Edit View History Bookmarks Window Help usn29ne.theexpertta.com Home I Student: hannah gregerson ucollege.edu My Account Log out Class Management I Help HW 01 Begin Date: 1/9/2017 11:50:00 AM Due Date: 1/11/2017 11:59:00 PM End Date: 1/11/2017 59:00 PM (20%) Problem 5: A positively charged particle QI +45 nC is held fixed at the origin. A second charge Q2 of mass m 6.5 ug is floating a distance d 35 above charge QI. The net force on Q2 is cqual to zero. Assignment Status Click here for detailed view Otheexpertta.com Problem Status A 25% Part (a) Which of the following represents the free-body diagram of charge Q2? Completed A 25% Part (b) What is the sign of the charge on Q2? 2 Completed A 25% Part (c) Write an equation for the magnitude of charge 02 in terms of the given variables. Completed 4 Partial A 25% Part (d) Calculate the magnitude of Q2 in units of nanocoulombs Grade Summary Deductions 0% Potential 100% sino coso tano CD 7 8 9 Submissions Attempts remaining: 6 cotano asi acos0 4 5 6 (S% per attempt) detailed view atan acotano sinh0 1 2 3 cosh0 tanho cotanho vo Degrees Radians,

Explanation / Answer

Part B : The sign of charge on Q2 will be poistive.

Part C : An equation for the magnitude of charge, Q2 in terms of the given variables -

According to coulomb's law, we have

F = ke Q1 Q2 / d2

m g = ke Q1 Q2 / d2

Q2 = m g d2 / ke Q1

Part D : Magnitude of charge Q2 will be given as :

using an above formula, we have

Q2 = m g d2 / ke Q1

Q2 = (6.5 x 10-9 kg) (9.8 m/s2) (0.35 m)2 / (9 x 109 Nm2/C2) (45 x 10-9 C)

Q2 = 1.92 x 10-11 C

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