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Q.A 115 g ball on a 60 cm long string is swung in a vertical circle about a point 200 cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height of 750 cm above the floor. What was the tension in the string an instant before it broke?

Q. A tobagan with a mass of 15 kg is being pulled with an applied force of 45 N at an angle of 40 degrees to the horizontal. What is the acceleration if the force of friction opposing the motion is 28 N?

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