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Q1. A 5.5kg dog stands on a 16kg flatboat at distance D = 6.1m from the shore. It walks 2.8 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is after that from the shore.

Q2. You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 31 kg. The rope is at an angle of 30 degrees to the ground. As you pull with a force of 30 N, the sled travels a distance of 45 m.

How much work do you do?

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