A Cannon Shoots a Charged,5

question 44

Multiple Choice

A cannon shoots a charged,5.0-kg cannon ball at some angle above horizontal ground in a region in which the electric field is given by 12.0 N/C ŷ,while gravitational acceleration is straight down,-9.8 m/s² ŷ.If the ball travels half the distance it would have if there were no electric field,what is the charge on the cannon ball?

• A)+ 4.1C
• B)-4.1C
• C)+ 12C
• D)-12C
• E)Cannot answer-the angle of launch is needed.

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