Asailor drops a wrench from the top of a sailboat's vertical mast while the boat is moving rapidly and steadily straight forward. where will the wrench hit the deck?

(a) ahead of the base of the mast
(b) at the base of the mast
(c)behind the base of the mast
(d)on the windward side of the base of the mast
(e)none of the above choices

B

Explanation:

The sailor, the boat and the wrench are all moving at he same constant rate, so the wrench will appear to fall straight down. This due to that fact there is no relative motion among them and all are at rest w.r.t to one another. Hence the correct answer would be B.

a.   mass number from atomic number

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