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when a parachute opens the air exerts a large drag force on it this upward force is initially greater than the weight
a rock climber throws a small first aid kit to another climber who is higher up the mountain the initial velocity of
a uniform metal rod with a mass of 34 kg and a length of 13 m is attached to a wall by a hinge at its base a horizontal
white light is incident at 45 degrees from air onto a 60-60-60 prism in which red light has n1500 and violet has n1600
a projectile is launched at 64 degrees at 637 ms from the top of a hill how far down the hill does the projectile hit
an interior decorator install an aquarium that is 050 m wide 200 deep and 400 m long the uncertainty of each
a wrecking ball is hanging at rest from a crane when suddenly the cable breaks the time it takes for the ball to fall
consider a particle of mass m moving freely in a two dimensional rectangular box with impenetrable walls the dimensions
an electronic advertising sign repeats a message every 82 seconds day and night for a week how many times did the
you find a pirate map which describes the path to a buried treasure starting from an old oak tree in a field the map
a 20000-kg railroad car travels down the track at 30 msec and hits a second stationary railroad car of 10000 kg the
two trees have perfectly straight trunks and are both growing perpendicular to the flat horizontal ground beneath them
in a football game a kicker attempts a field goal the ball remains in contact with the kickers foot for 0050 s during
an empty hollow metal sphere has a potential of 170 v with respect to ground defined to be at v 0 and has a charge of
a spherical drop of water carrying a charge of 28 pc has a potential of 505 v at its surface with v 0 at infinitya
an electron is fired directly toward the center of a large metal plate that has excess negative charge with surface
in solid sodium chloride table salt chloride ions have one more electron than they have protons and sodium ions have
a jet moving at 5000 kmh due east is n a region where the wind is at 1200 kmh in a direction 3000 degrees north of east
when an object moves through a fluid the magnitude of the drag force f drag acting on the object is given by
a boy 110m above the ground in a tree throws a ball for his dog who is standing right below the tree and starts running
a football is thrown with an initial upward velocity component of 125ms and a horizontal velocity component of 170mshow
a daring 51kg swimmer dives off a cliff with a running horizontal leap as shown in the figure belowwhat must her
a military helicopter on a training mission is flying horizontally at a speed of 900ms when it accidentally drops a
a 2600 kg automobile is traveling at 20 ms when the brakes are applied the braking force is 10192 n use work-energy
a certain source of sound radiates uniformly in all directions in air at a distance of 5m the sound level is 80 db the