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Q. A stone with a mass of 0.700 is attached to one end of a string 0.800 long. The string will break if its tension exceeds 65.0 . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed.

Q. A 3.35 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.230 s, what is the average force exerted on the ball by the wall?

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