There are six books in a stack, each with a weight of 3.0 N. The coefficient of friction between all the books is 0.20 as is the coefficient between the table and the bottom book. What horizontal push must I just exceed on the next to bottom book to start sliding the top five books off the bottom one?
a. 1.0 N
c. 3.0 N
b. 5.0 N
d. 7.0 N
C
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Indicate whether the statement is true or false
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What will be an ideal response?
Bar A has one end painted green and the other end red and may or may not be a magnet. A student brings the north pole of a bar magnet M close to the green end of A. He observes that the green end is attracted. He can conclude that
A. A is a magnet and the green end is a south pole. B. A might be a magnet; this observation does not provide enough information to determine whether or not it is. C. A is a magnet and the green end is a north pole. D. A is not a magnet.