What is the maximum speed the ball can have

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Q. A particle of mass 1.20 kg with a charge of +2.30 mC is shot into a region with an electric field of strength 18.0 N/C, having a direction opposite the particle's velocity. If the particle has an initial speed of 3.00 m/s, how long does it take to come to a complete (though momentary) standstill? Assume there are no other forces acting on the particle.

Q. A 0.80 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.2 m on a frictionless horizontal surface.If the cord will break when the tension in it exceeds 55 N , what is the maximum speed the ball can have?

Reference no: EM1363199

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