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A2 solutions: Newton's 1st

1. A submerged ball of negligible mass is attached to the bottom of a swimming pool by two strings as shown. The volume of the ball is 5000cm3. Calculate the tension in each string.Hint: Solution:2. The friction between two surfaces is given by F=µN where µ is the coefficient of friction and N is the Normal force. Calculate the friction force between the box and ground in the diagram if µ= 0.5

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