l) A plastic rod is rubbed against a wool shirt, thereby acquiring a charge of -0.8x l D'C. How many electrons are transferred from the wool shirt to the plastic rod? 31? g'g 2) A charge of 4x10'5C is 2m away from an 8x10'5C charge. What is the force between them? How would your answer differ if they are 4111 away? How would your answer differ if one of the charges is doubled? 0.072N 3) Three point charges are on the x axis. ql= -6xlO*'C is at x=-3n1, q2= 4x10'5C is at the origin, q3= 6x104'C is at x=3m. What is the net force are charge ql? 0.033N to the right 4) A block of unknown charge is brought near a xed charge of 2.31:10'5 C. The closest the block can be placed is 0.7 m. Any closer and the block will slide. The coefcient of static friction between the surface and the 3 kg block is 0.45. What is the charge on the block? QJQEM" Q How many electrons are on the block? 1'. 96x10' '2 's 5) An electron, mass 9.11x10'3' kg, orbits a single proton. lfthe 0.5m electron travels in a perfect circle traveling at the speed of light, 31:10?I mfs, (which it does not) how far is the electron from the proton? lgf\" m 0-2"! 6) Using the drawing on the LEFT: qa= +7pC, qb= +4uC, qc= -9x10' 5 C 0 Find net force acting on \"".B 1.11 N@ 2,592\" '1') Where can you place a charge with respect to the charge of the left so the net force acting on it is 8) Using the same diagram above, but a POSITIVE l4pC charge, where could you place a charge so the net force acting on it is zero? 0. 9m t9 thg right gt rhg HEM