Which is an example of gaining a static charge by conduction?
A)
Rubbing a balloon against your hair.
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Shuffling your shoes across a carpet.
o
Bringing a charged rod near an electroscope.
Touching your car on a cold day and getting a shock.

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.