A Small Ball with a Mass of 40 G and a Charge

question 19

Multiple Choice

A small ball with a mass of 40 g and a charge of -0.3 $\mu$ C is suspended from the ceiling on a string.The ball is suspended a distance of 7.0 cm above an insulating floor.If a second small ball with a mass of 50 g and a charge of 0.6 $\mu$ C is placed on the floor directly beneath the first ball,what is the tension in the string?

• A)0.04 N
• B)0.06 N
• C)0.33 N
• D)0.39 N
• E)0.72 N