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starting from rest a 94 kilogram firefighter slides down a fire pole the average frictional force exerted on him by the
a 103 gram granite cube slides down a 40 degree frictionless ramp at the bottom just as it exits onto a horizontal
if a toaster is plugged into a source of alternating voltage with an rms value of 134 v an rms current of 575 amp
two parallel sheets of aluminum foil separated by 01 millimeter are connected to a 9 volt battery the area of each
a 120 volt battery remains connected to a parallel plate capacitor with a plate area of 0184 m2 and a plate separation
the damage caused by electric shock depends on the current flowing through the body 1 ma can be felt and 5 ma is
a 1000 kilogram boat travels across a lake when its engine is shut off magnitude of friction between water and boat is
a computer hard drive disk with a diameter of 35 inches rotates at 7200 rpm the read head is positioned exactly halfway
a 330 kilogram birdfeeder hangs from the tip of a 160 meter pole that sticks up from the ground at a 650 degree angle
a thermos contains 150 cm3nbspof coffee at 850c to cool the coffee you drop two 11 gram ice cubes into the thermos the
a train moving with a constant speed of 75 kmhr moves east for 45 minutes then in a direction 20o east of north for 60
a 510 kilogram swimmer with an initial speed of 128 ms decides to coast until she comes to rest if she slows with
a 020 kilogram ball is thrown straight up into the air with an initial speed of 18 ms compute the momentum of the ball
a block of wood weighs 160 newton and has a density that equals 60 that of seawater find what additional downward
on vacation your 1200 kilogram car pulls a 600 kilogram trailer away from a stoplight with an acceleration of 120 ms2
find what plate separation is required for a parallel plate capacitor to have a capacitance of 740 nf if the plate area
sam walks 040 kilometer in a direction 600o west of north then goes 050 kilometer due west determine what is his
a parallel plate capacitor has a plate area of 0535 m2 and a plate separation of 145 millimeter estimate what is its
a 20 kilogram mass hang from two ropes that are attached to the ceiling each rope makes an angle of 60o with the
a powerful bolt of lightning can carry a current of 225 kaa treating a lightning bolt as a long thin wire determine the
you are on a roof that is 15 m high and you are launching balloons off at an angle of 30o above the horizon with a
a crate is dragged 30 meter along a rough floor with a constant velocity by a worker applying a force of 500 newton to
a proton travels horizontally with speed 4 x 106 ms in a vertical uniform magnetic field of 15 tesla 15 x 104 gauss
a generator uses a coil that has 490 turns and a 075 t magnetic field the frequency of this generator is 600 hertz and
a 700 gram bullet when fired from a gun into a 120 kilogram block of wood held in a vise penetrates the block to a