An adjustable bracket with a collar slides on a pole and is held in place by friction at A and B. The min- imum coefficient of static friction between the pole and collar so that the collar is self-locking against the pole under applied load F is:
(A) 0.25
(B) 0.31
(C) 0.42
(D) 0.83
(B) 0.31
You might also like to view...
Acceleration due to gravity on the Moon is less than on Earth, and the Moon is smaller than Earth. This means that compared to an Earth satellite, a satellite in close orbit about the Moon would travel
A) slower. B) faster. C) the same. D) need more information
Determine the Schmidt number for benzene evaporating into air at 25ºC.
What will be an ideal response?
A rod is 4.0 m long and has a square cross-section that is 1.5 cm on each side. An ohmmeter measures 0.040 ? across its ends. What is the resistivity of the material from which this rod is made?
A) 2.3 × 10-6 ? ? m B) 1.5 × 10-4 ? ? m C) 0.015 ? ? m D) 0.023 ? ? m
Saturn's F ring and the rings of Uranus are similar in that
a. they are made of dark material. b. they are made of icy material. c. they are found near large moons. d. they show well-defined spokes. e. they are very narrow.