The coefficient of static friction is always larger than the coefficient of kinetic friction
Indicate whether the statement is true or false
TRUE
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Which of the following statements about Mars is not true?
A) We have landed spacecraft on its surface. B) It is considered part of our inner solar system. C) We could survive on Mars without spacesuits, as long as we brought oxygen in scuba tanks. D) It has some liquid water today, but used to have large amounts of flowing water.
Two blocks in contact with each other are pushed to the right across a rough horizontal surface by the two forces shown. If the coefficient of kinetic friction between each of the blocks and the surface is 0.30, determine the magnitude of the force exerted on the 2.0-kg block by the 3.0-kg block
a.
15 N
b.
25 N
c.
11 N
d.
22 N
e.
33 N
A spectroscopic binary shows periodic variations in its
a. radial velocity. b. proper motion. c. brightness. d. mass. e. spectral type.
If Earth is closest to the Sun in January of each year, what can we say about the speed of Earth in its orbit around the Sun at this time of year?