Picture the corner of a room. Imagine the corner of a room. Let's say that the left wall leading into the corner is labeled 1, the corner itself is labeled 2, and the right wall leading from the corner 3 (I hate that I can't draw here!). O.K., a cat runs across the floor from 1 to 2 to 3 without increasing or decreasing his speed. He only changes his direction of motion at 2 (the corner). Can we say for sure that a force was exerted on the cat at 2?
a) Yes, there had to be a force on the cat at 2.
b) Not necessarily, since no change in the cat's speed occurred.
2007-09-14
16:21:21
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2 answers
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