A Metal Ball Hangs from a String

question 8

Multiple Choice

A metal ball hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 25 degree angle away from the vertical.If the charge on the ball is 1.4 * 10^-5 C,what is the mass of the ball?

• A)49 g
• B)22 g
• C)52 g
• D)46 g
• E)37 g

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