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an elevator cab that weighs 277 kn moves upwarda evaluate what the tension in the cable if the cabs speed is increasing
a two-stage rocket moves in space at a constant velocity of 5050 ms the two stages are then separated by a small
in a football game a receiver is standing still having just caught a pass before he can move a tackler running at a
a civil engineer wishes to redesign a curved roadway in such a way that a car will not have to rely on friction to
a man brings to work a 57 kilogram box of books by the time he reaches the ramp outside of his office he attaches a
a boat moves through the water with two forces acting on it one is a 2170 newton forward push by the motor and the
in a plane radio wave the amplitude of the electric field vector is 100 vma compute the amplitude of the magnetic field
a determine how fast must a 20 kilogram mass move to have a kinetic energy of 90 joule does the kinetic energy of the
during the power stroke in a four-stroke automobile engine the piston is forced down as the mixture of combustion
when responding to sound the human eardrum vibrates about its equilibrium position assume an eardrum is vibrating with
a boat moves through the water with two forces acting on it one is a 2170 newton forward push by a motor and the other
a ball player hits a home run and the baseball clears a wall 800 m high located 1401 m from home plate the ball is hit
a 56 kilogram rock with a volume of 21 l is completely submerged in water the density of water is 1 kgla evaluate what
a kid of mass 20kg is playing with a swing with an arm length of 5 m his sister first pushes him such that the maximum
a microwave oven operates at 27 ghz evaluate what is the distance between wave crests in the
a meter stick by a mass of 0250 kg is pivoted about one end so that it can rotate without friction about a horizontal
in an american football game a 904 kilogram fullback running east with a speed of 507 ms is tackled by a 940 kilogram
a red blood cell typically carries an excess charge of about ndash25times10ndash12 c distributed uniformly over its
evaluate the peak electric field inside a 645 w microwave oven under the simplifying approximation that the microwave
common transparent tape becomes charged when pulled from a dispenser if one piece is placed above another the repulsive
a light signal is sent from the origin of a system k at t0 to the point x3m y 5m z 10mnbsp a at what time t is the
at 23 kilometer from the transmitter the peak electric field of a radio wave is 330 mvma determine what is the
in an emergency stop to avoid an accident a shoulder-strap seat belt holds a 60 kilogram passenger firmly in place if
a lens for a 35 millimeter camera has a focal length given by f 61 millimetera find how close to the film should the
a neutron in a reactor makes an elastic collision head on with a nitrogen atom that is initially at restthe mass of the