T2a5p - Physics 102 Assignment 5 Problems(Spring Term 1 An electron is released a short distance above Earth\u2019s surface A second electron directly

T2a5p - Physics 102 Assignment 5 Problems(Spring Term 1...

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Physics 102 Assignment 5 Problems (Spring Term) 1. An electron is released a short distance above Earth’s surface. A secondelectron directly below it exerts an electrostatic force on the first electron justgreat enough to cancel the gravitational force on it. How far below the firstelectron is the second?( R = 5.08 m)2. Two small metallic spheres, each of mass 0.20 g, are suspended as pendulumsby light strings from a common point as shown in Figure P15.15. The spheresare given the same electric charge, and it is found that the two come toequilibrium when each string is at an angle of 5.0° with the vertical. If each stringis 30.0 cm long, what is the magnitude of the charge on each sphere?( q = 7.2 nC = 7.2 x 10-9C )Figure P15.153. A charge of 6.00 × 10–9C and a charge of –3.00 × 10–9C are separated by adistance of 60.0 cm. Find the position at which a third charge of 12.0 × 10–9Ccan be placed so that the net electrostatic force on it is zero.( x = 1.45 m beyond the –3.00 nC charge)4. A proton accelerates from rest in a uniform electric field of 640 N/C. At some later

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