A body sliding on a table is observed to gradually slow down. The correct statement is that the body slows down because
A. no net force acts on the body.
B. no force acts on the body.
C. it is the nature of the body to slow down by itself.
D. a net force acts on the body.
Answer: D
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A. 8.0 m/s2 B. 9.6 m/s2 C. 12 m/s2 D. 24 m/s2
Sirius, the brightest star in the sky, is 8.7 ly from the Sun. Determine Sirius' declination and right ascension
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?
A) at either A or B B) midway between A and B C) one-third of the way between A and B D) one-fourth of the way between A and B E) none of the above
the greater average kinetic energy per molecule,
A. The quantity is greater for gas A. B. The quantity is greater for gas B. C. The quantity is the same for both gases. D. One does not know enough to compare the quantities.