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a 68-kg base runner begins his slide into second base when he is moving at a speed of 42 ms the coefficient of friction
a sledge loaded with bricks has a total mass of 170 kg and is pulled at constant speed by a rope inclined at 199deg
starting from rest a 450-kg block slides 300 m down a rough 300deg incline the coefficient of kinetic friction between
1 a styrofoam cooler k 030 wmo c has an average surface area of 0576 m2 and an average thickness of 26 cm there are
a rocket-powered hockey puck has a thrust of 20 n and a total mass of 10 kg it is released from rest on a frictionless
a battery supplies 071 a to three resistors connected in parallel the current through the first resistor is 027 a and
a dinoflagellate takes 49 s to travel 05 mm approximate a dinoflagellate as a sphere of radius 350 microm ignoring the
a water tower supplies water through the plumbing in a house a 254-cm-diameter faucet in the house can fill a
a nozzle of inner radius 105 mm is connected to a hose of inner radius 795 mm the nozzle shoots out water moving at 255
a light rope is wrapped several times around a large wheel with a radius of 4 m the wheel rotates in frictionless
identical blocks are projected up each track with the same initial speed v0 on the longer track the block slides upward
the intensity of a lightbulb with a resistance of 160 ohms is controlled by connecting it in series with an inductor
a semi-trailer is coasting downhill along a mountain highway when its brakes fail the driver pulls onto a runaway truck
an extreme skier starting from rest coasts down a mountain that makes an angle of 343 deg with the horizontal the
a stone used to grind wheat into flour is turned through 12 revolutions by a constant force of 216 n applied to the rim
a bowling ball made for a child has two thirds the radius of an adult bowling ball they are made of the same material
at a recent rock concert a db meterregistered110db when placed200m in front of a loudspeaker on the stagea what was the
the equation for the displacement in meters of an object moving in shm is xt 150 cos 420t where t is in secondsa what
a force acts along the displacement of the asteroid and slows it down the asteroid has a mass of 37 times 104 kg and
ions a and b are separated by 12 e -10m ion a has a charge of -2e the electrostatic force between the two ions has a
an object is moving in simple harmonic motion with amplitude 028 m and total energy 25 j by some means its amplitude is
a 28 kg solid sphere radius 020 m is released from rest at the top of a ramp and allowed to roll without slipping the
suppose that a 100 cm3 box in the shape of a cube is perfectly evacuated except for a single particle of mass 105 10-3
what is the potential difference between the terminals of a battery that can impart 68times1019 rm j to each electron
a container of cross-sectional area 107 cm2 contains liquid of density 235 gcm3 to a height of 690 cm above a small