Newton's Second Law in 1 Dimension: A 10-kg object is hanging by a very light wire in an elevator that is traveling upward. The tension in the rope is measured to be 75 N. What are the magnitude and direction of the acceleration of the elevator?
Fill in the blank(s) with the appropriate word(s).
2.3m/s2, downward
Physics & Space Science
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a. carbon b. iron dust c. carbon dust d. helium e. hydrogen
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My 5.0 hp mower would be equivalent to an electric mower rated at what power?
A) 2.8 W B) 0.25 KW C) 2.8 KW D) 3.7 KW E) 0.78 KW
Physics & Space Science
Kepler's idea that planets move in ellipses around the sun is best classified as
A) a fact. B) an incorrect fallacy. C) an experimental observation. D) a useful theory. E) a hallucination.
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Potential-energy values may be
a. positive only. b. negative only. c. zero only. d. all of these.
Physics & Space Science