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an astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar space at a constant
you want to lift a 500-lb object with a lever you can place a falcrum under a long board a distance of 15 ft from the
in a headon collision without friction a 4000 kg truck going 10ms due east strikes a 2000kg car gong 40ms west after
the titanic was found in 1985 lying on the bottom of the north oceanthe pressure that the titanic felt at that depth
a cat with mass 45 kg is sitting on top of a turntable of mass 20 kg and radius 14 m both the cat and the turntable are
a baseball is thrown from the roof of a 220 m tall building with an initial velocity of mag 120 ms and directed at an
magnetic field lines can be entirely confined within the core of a toroid but not within a straight solenoid
two air hockey pucks moving with identical speeds v collide on a level table with respect to the table puck 1 is moving
coulombrsquos law for electrostatic force between two point charges and newtonrsquos law for gravitational force
a sound pulse emitted underwater reflects off a school of fish and is detected at the same place 001 seconds later how
an early model for an atom considered it to have a positively charged point nucleus of charge ze surrounded by a
determine the weight at standard gravity of 100 lbm ina lbf b poundals c dynes and d
so a bike went 10m in 4 seconds and the acceleration was constant the whole way what was the instantaneous velocity at
a very large truck sits on a frozen lake assume there is no friction between the tires and the ice a fly suddenly
consider the transitions 3d --ampgt2p in hydrogen calculate the possible energies of emitted photons taking into
a copper cable needs to carry a current of 200 a with a power loss of only 30 wm what is the required radius of the
a what is the coefficient of kinetic friction between the crate and the floork b if the 320-n force is instead pulling
a 60kg block slides along the top of a 100kg block with an acceleration of 20ms2 when a horizontal force of 350n is
a carpenter carries his 8kg toolbox at constant speed up 2 flights of stairs each 3m high in one minutea how much work
two cars are driving along robinson street during an ice storm when they hit a patch of ice the car in front is
a tennis ball of mass mt is held just above a basketball of mass mb with their centers vertically aligned both are
two ice skaters are gliding together along the ice both moving at a constant velocity sliding without exerting a force
a 1800 kg pile driver is used to drive a steel i-beam into the ground the pile driver falls 400 m before coming into
a sled of mass m is given a kick on a frozen pond the kick imparts to it an initial speed of vi 250 ms the coefficient
a block of mass 120 kg slides from rest down a frictionless 350deg incline and is stopped by a strong spring with k