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A student wishes to determine the coeffiecient of static between a block of material and a wooden board. He places the board on a table, places the block on the board and gradually raises one end of the board. When the end of the board has been raised 20 cm the block slides 77.3 cm down the entire length of the board in 1.6 seconds . Find
(a) the coefficient of static friction
(b) the coefficient of kinetic friction
(c) the angle for which the velocity of the block will be constant.
(d) How hard must one press on the block, perpendicular to the inclined surface to prevent it from sliding down a 30 degree incline?
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 503nm, What is the intensity in (W/m^2) delivered to a rod
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An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
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Let all the three charges be placed at the center of a tetrahedron, composed of four triangular faces of equal area. Calculate the net flux through each surface
What is moment of inertia
A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3.1 m and moment of inertia 1300 kg ·m2. Calculate the angular velocity when the person reaches the edge
A wave on a string has a speed of 397 m/s. If the tension in the string is 128 N and its length is 1.9 m, what is the mass of the string
Two conductors having net charges of +17.0 µC and -17.0 µC have a potential difference of 17.0 V between them. What is the potential difference between the two conductors
What is the coefficient of kinetic friction
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