Please help, answering these questions for Mechanical work and energy conversion

Question

Please help, answering these questions for Mechanical work and energy conversion into heat experiment for physics 1 course.

1. Why is aluminum a better choice for the object than, say, steel or plastic?

2. In this experiment, we do not want a significant amount of heat to be transferred from the air to the cylinder, or from the cylinder to the air. Would it be better to have a long narrow cylinder (say, diameter = 1 cm), assuming it had the same volume, or not? Explain.

3. In this experiment, the starting temperature was about as far below room temperature as the final temperature was above room temperature. Explain why this procedure tends to minimize the effect of heat transfer between the cylinder and the environment.

4. Why is it not necessary to crank at a constant rate?

5. A small error occurs if you pull on the loose end of the cord while turning the crank. Why is this error unimportant

Explanation / Answer

Ans 1: There is given below the reason that Why is aluminum a better choice for the object than, say, steel or plastic,

Aluminum

Plastic:

Steel:

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