If an object's acceleration is nonzero, its velocity must be __________
Fill in the blank(s) with correct word
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A uniform rod of length L and weight W is placed on a fulcrum a distance of 0.4L from the left end. On the left end is placed a mass of weight 2W and on the right end a vertical force F is applied to keep the system in balance. What are the magnitude and direction of the force F?
a. 7/6 W up b. 4/3 W down c. 7/6 W down d. 4/3 W Up
What makes the North Star, Polaris, special?
A) It is the brightest star in the sky. B) It is the star straight overhead. C) It appears very near the north celestial pole. D) It is the star directly on your northern horizon. E) It can be used to determine your longitude on Earth.
If a person in Alaska were locked out of his house on a day when the temperature outside was ?40°C, his thick clothing would mostly reduce the loss of thermal energy by
A. conduction. B. convection. C. radiation. D. all of the above. E. convection and radiation.
The kilowatt is a measure of
A) force. B) sex appeal. C) energy. D) power. E) speed.