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a loop is pulled with a force f to the right to maintain a constant speed of 80 ms the loop has a length of 015 m a
a transparent oil with index of refraction 119 spills on the surface of water index of refraction 133 producing a
a coating is applied to a lens to minimize reflections the index of refraction of the coating is 150 and that of the
a thin rod of length 089 m and mass 110 g is suspended freely from one end it is pulled to one side and then allowed to
an optometrist has a choice to give a patient either regular glasses or contact lenses to correct nearsightedness
a ball of mass m08kg is tied to the end of a string of length l02m and released when the string is held horizontally
a rifle with a mass of 25 kg fires a bullet with a mass of 55 g 00055 kg the bullet moves with a muzzle velocity of 330
a fullback with a mass of 75 kg and a velocity of 40 ms due west collides head-on with a defensive back with a mass of
a ball traveling with an initial momentum of 35 kgmiddotms bounces off a wall and comes back in the opposite direction
an average force of 270 n acts for a time interval of 004 s on a golf balla what is the magnitude of the impulse acting
big yellow fish swimming at 20ms swallows little green fish at rest big yellow fish is 3 times as massive as little
a 60 kg barrel is lifted 20 m in the air using a pulley system with a mechanical advantage of 3 a person only needs to
520-n uniform rectangular sign 400 m wide and 300 m high is suspended from a horizontal 600-m-long uniform 150-n rod as
during a violent thunderstorm hail the size of marbles diameter 210 cm falls at a speed of 370 ms there are estimated
a blu-ray disc has a mass of 20 g and is 12 cm in diameter the fastest drives can spin the disc at 10000 rpm after
the body in the figure is pivoted at o and two forces act on it as shown if r1 265 m r2 220 m f1 424 n f2 571 n 1
a uniform 345-kg beam of length 495 m is supported by a vertical rope located d 120 m from its left end as in the
a horizontal spring is lying on a frictionless surface one end of the spring is attaches to a wall while the other end
a spring is hung from the ceiling a 0463 -kg block is then attached to the free end of the spring when released from
a person bending forward to lift a load with his back figure a rather than with his knees can be injured by large
a uniform 19-kg rod that is 078 m long is suspended at rest from the ceiling by two springs one at each end both
a cosmic-ray proton in interstellar space has an energy of 170 mev and executes a circular orbit having a radius equal
a proton moves with a velocity of 4i 5j k ms in a region in which the magnetic field is i 2 k t what is the
a bowling ball encounters a 0760-m vertical rise on the way back to the ball rack as the drawing illustrates ignore
a stationary bicycle is raised off the ground and its front wheel m 138 kg is rotating at an angular velocity of 143