27. (a) In the region
a gaussian surface would enclose no charge. Thus, due to the spherical
0 r r1 ,
symmetry, we have the following.
r r
Q
2
EgdA E 4 r encl 0 E 0
0
(b) In the region
r1 r r2 ,
only the charge on the inner shell will be enclosed.
r r
Qe
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Department of Physics
EXAM Ei~
PHY2053
Dr. Darici
In order to get partial credit you need to show your work in detail.
Show the formula you use and show clearly how you plug in the numbers. Even
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in multiple c hoic
.- PHY 2053 EXAM I — Online — Dr. Darici . _
In order to et artial credit ou need to show our work clearl inCIudin the
formulas ou used. No artial credit for multi le choice roblems but to et the
full credit ou need to shdw our work. Correct answer alone
PART III WC” M M ‘90 0k
6. Calculate the net torque about point 0 for the two forces applied as shown in the \
figure. The rod and both forces are in the plane of the page. '6 WWW
3. Find the linear accelerations of blocks A and B, the angular acce eratio
PART III 1cm M N [9° 0k
6. Calculate the net torque about point 0 for the two forces applied as shown in the g
figure. The rod and both forces are in the plane of the page. @A mass of 395 g hangs from one end of a string that goes over a pulley with a@
mo
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In order to get any points you need to show yoj‘lr workin detail.
1. A 53 kg mass is connected to a nail on a frictionlessgtﬁhle by a (massless) string of
length 1.3 m. If the tension in the string is 51 N while the nias
to
PHYZOSB SummerA 2011 — EXAMLII Dr. Darici
In order to receive partial credit you need to show your work. You need to wn'te the formula you used and Show how you plug in the
values. Correct answer along is not accepted Do not separate an y pages from yo