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an auto race is held on a circular track a car completes onelap in a time of 215 seconds with an average tangential
a 650 kg person throws a0045 kg snowball forward with aground speed of 300 ms a secondperson with a mass of 600
a source emits sound wavesof frequency 200 hz which move through still air at 340 ms thesource moves with a speed of 80
a car with a mass of 1500kg moving at 40ms comes to a stop in8 secondswhat is the change in momentum of the carwhat is
a 420 kg seal at an amusement part slides from restdown a ramp into the pool below the top of the ramp is 175mhigher
two railroad cars each of mass 6500kg and traveling 94 kmh in oppositedirections collide head-on and come to rest how
a spring with spring constant k stands vertically and a massm is placed on top of it the mass is gradually lowered
a 100w yellow lightulb550nm is 100m away from a 3cm diametershuttered aperture what is the total
in a certain cyclotron a proton moves in a circle of radius0800 m the magnitude of the magneticfield is 110 ta what is
an ideal monatomic gas with 36mol undergoes a reversible increase in temperature from 380 k to445 k at constant volume
40 kj of heat was added to a 500-g piece of wood whosetemperature then rose from 20 degrees c to 68 degrees c what was
a 60kg girl is standing on a frictionless skateboard what isthe magnitude of the force exerted on the girl by the
a 25g object moving to the right at 20 cms overtakes andcollides elastically with a 100g object moving in the
a ski starts from rest and slides down a 29deg incline 100 mlong use energy methodsa if the coefficient of friction is
high-speed stroboscopic photographs show that the head of a200-g golf club is traveling at 55ms just before it strikes
a system of two paint buckets connected by a light weight rope isreleased from rest with the 120-kg bucket 200m above
the work required to stretch a certain spring from anelongation of 4cm to 5cm is 305j what is the work required to
a baseball player dives into third base with an initial speed of815 ms if the coefficient ofkinetic friction between
a 10 gauge bare wire 26 mm in diameter can carry a currentof 51 a without overheating for thiscurrent what is the
most of us know intuitively that ina head-on collision between a large dump truck and a subcompactcar you are better
an airplane flies in a loop a circlar path in a verticalplane of radius 150m the pilots head always points toward
a motercycle has a mass or 250102 kg a constantforce is excerted on it for 600s the motercycles initialvelocity is
in the old west a marshal riding on a train traveling 50 ms seesa duel between two men standing on the earth 50 m apart
when 1g of natural gas is burned in a stove about 56kj ofheat is produced how much mass is lost in the process can this
original problem a person walks at constant speedv1 along a straight line from a to b and then back alongthe line from