To push a piece of heavy furniture across the carpet usually takes more force to get it moving than it takes to keep is moving. This is because
A) of Newton's first law.
B) of Newton's second law.
C) the static coefficient of friction is larger than the kinetic coefficient.
D) the kinetic coefficient of friction is larger than the static coefficient.
E) of Newton's third law.
C
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Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (A), the distance Albert can throw a small rock
One albert is 92 meters How many square alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
The potential difference across the terminals of a storage battery not connected in any circuit is observed to be 12 V. When it is connected to an external resistance the potential difference across the terminals is observed to be 11 V while the current in the external resistance is 3 A. What is the internal resistance of the battery?
A. 2.0 ohms B. 0.33 ohm C. 5.5 ohms D. 1.0 ohm E. Zero ohms
A damped oscillator is released from rest with an initial displacement of 10.00 cm. At the end of the first complete oscillation the displacement reaches 9.05 cm. When 4 more oscillations are completed, what is the displacement reached?
a. 7.41 cm b. 6.71 cm c. 6.07 cm d. 5.49 cm e. 5.25 cm
An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?
a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead