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when jumping straight down you can be seriously injured if you land stiff-legged one way to avoid injury is to bend
a particle of mass m is subjected to a force ft kte-alphat where k is a constant and alpha 05 s-1 if the particle is
the surfer is catching a wave suppose she starts at the top of the wave with a speed of 15 ms and moves down the wave
a 1750-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car
determine the magnitudes and directions of the currents in each resistor shown in fig 19-48 the batteries have emfs of
in 20 minutes a ski lift raises 5 skiers at constant speed to a height of 140 m the average mass of each skier is 65 kg
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a person is making homemade ice cream she exerts a force of magnitude 21 n on the free end of the crank handle on the
a pitcher throws a 0140-kg baseball and it approaches the bat at a speed of 300 ms the bat does wnc 750 j of work on
a projectile of mass 1400 kg is shot straight up with an initial speed of 210 msa how high would it go if there were no
a person starts from rest at the top of a large frictionless spherical surface and slides into the water below see the
a 0800 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1875 j and at its highest
an object has a kinetic energy of 299 j and a momentum of magnitude 255 kgmiddotms find the speed and the mass of the
to stretch a certain spring by 240cm from its equilibrium position requires 800j of workwhat is the force constant of
assume the magnitude of the electric field on each face of the cube of edge l 103 m in the figure below is uniform and
the motion of an object is described by the equation x 19 m cost35 where t is assumed to be measured in secondsa what
a particle with charge q 470 microc is located at the center of a cube of edge l 0200 m in addition six other
ccccthe zambesi river in africa rushes over victoria falls at a rate of 25 x 106 gallons per minute the falls are 108 m
a light spring with a force constant of 13nm is connected to a wall and a 12-kg toy bulldozer when the electric motor
when at rest a proton experiences a net electromagnetic force that has a magnitude of 72 x 10-4 n and points in the
three identical train cars coupled together are rolling east at speed a fourth car traveling east at 2 catches up with
steam at 200 psia and 600 f state 1 enters a turbine through a 3-inch-diamter pipe with a velocity of 10 fts 1 the
a water heater consisting of a metal coil that is connected across the terminals of a 24-v power supply is able to heat