A simple pendulum bob of mass carries a negative charge and is placed in a downward…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

A simple pendulum bob of mass

m

carries a negative charge

-q

and is placed in a downward electric field

E

, where

mg>qE

. At equilibrium, the change in tension in the string is, assuming the bob is initially at rest: (1)

mg

(2)

qE

(3)

2qE

(4)

\dfrac{qE}{2}