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Q. Two ants race across a table 74 cm long. One travels at4.64 cm/s and the other at 3.99999 cm/s. while first one crosses the finish line, how far behind is the second one? Answer in units of cm.

Q. A stainless steel orthodontic wire is applied to a tooth. The wire has an unstretched length of 3.1 cm and a diameter of 0.22mm. If the wire is stretched 0.10 mm, determine the magnitude and direction of the force on the tooth. Disregard width of the tooth and suppose the Young's modulus for stainless steel is 18 x 10^10 Pa.

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