Content by Weeks pin x Hw 1.ch 15 Two smal metallic spher x C D www.webassign ne

Question

Content by Weeks pin x Hw 1.ch 15 Two smal metallic spher x C D www.webassign net/web/student/Assignment Responses Mutoriandep 15180030 -1 points sercP10 15 P015. Two small metallic spheres, each of mass m o.25 g, are suspended as pendulums by light strings from a common point as shown in the figure below. The spheres are given the same electric charge, and it is found that they come to equilibrium when each string is at an angle of o 7.1e with the vertical. if each string has length L o cm, what is the of the charge on each sphere? Need Help? Show My Work op onan Submit Answer save Progress Practice Version Another Ask Tour o -o points sercP10 15 P018 left of the middle charge shown figure below. (Enter the magnitude of the electric field only in the (a) Determine the electric field strength at a point 1.00 cm to the a B On e O Type or speak to me.

Explanation / Answer

sigma Fx = 0, F = m g tan 7.1

sigma Fy = 0 , T = m g / cos 7.1

At equilibrium, r = 2 L sin 7.1

F = m g tan 7.1 = ke q2 / (2 L sin 7.1) = m g tan 7.1

q = (2 L sin 7.1) * sqrt [m g tan 7.1 / ke]

= [2 * 0.38 * sin 7.1 ] * sqrt [0.25 * 10-3 * 9.8 * tan 7.1 / 8.99 * 109]

= 17.3 nC

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