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The 100-mm-radius brake drum is attached to a flywheel which is not shown. The drum and flywheel together have a mass of 300 kg and a radius of gyration of 600 mm. The coefficient of kinetic friction between the brake band and the drum is 0.30. Knowing that a force P of magnitude 50 N is applied at A when the angular velocity is 180 rpm counterclockwise, determine the time required to stop the flywheel when a = 200 mm and b = 160mm.
A fighter jet is launched from an aircraft carrier with the aid ofits own engines and a steam-powered catapult. The thrust of itsengines is 2.00 105 N. What is the work doneon the jet by the catapult
big ben the parliament building tower clock in london has hour and minute hands with lengths of 2.70 m and 4.50 m and
Two point charges, q1 and q2 attract each other with a force of.012N. q1 is positive and has a charge of .4uC and q2 is negative and has a charge of -.3 uC.
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 15 above the moat. The rock is launched at a speed of 21 and an angle of 30 above the horizontal. How far from the castle wall does the launched..
the position of a particle moving along an x axis is given by x 13.0t2 - 2.00t3 where x is in meters and t is in
A 8.0 kg object undergoes an acceleration of 2.5 m/s2. What is the magnitude of the resultant force acting on it? If this same force is applied to a 16.0 kg object, what acceleration is produced?
a 8.0--diameter disk emits light uniformly from its surface. 20 from this disk along its axis is an 9.0--diameter
you are given a slide with two slits cut into it and asked how far apart the slits are. you shine white light on the
A rifle fires a bullet of mass 0.0350 kg which leaves the barrel with a positive velocity of 304 m/s. At what velocity does the rifle recoil
The free-fall acceleration on the surface of Mars is about three eighths that on the surface of the Earth. Find the ratio of their average densities, ?Mars/?Earth
the human body normally produces about 2 x 106 red blood cells per second.a. use scientific notation to express how
An initially uncharged 3.87-?F capacitor and a 6.99-k? resistor are connected in series to a 1.50-V battery that has negligible internal resistance. What is the initial current in the circuit, expressed in milliamperes?
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