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the fastest recorded pitch in major league baseball was thrown by nolan ryan in 1974 if this pitch were thrown
a football is thrown at an angle of 38 above the horizontal assume the ball is throw and received at the same height to
during liftoff a hot-air balloon accelerates upward at a rate of 34 the balloonist drops an object over the side of
an artillery shell is fired at an angle of 638 above the horizontal ground with an initial speed of 2000 ms the
a running 61-kg cheetah has a top speed of 30 msa what is the cheetahs maximum kinetic energyjb find the cheetahs speed
a mechanic pushes a 280 103-kg car from rest to a speed of v doing 4650 j of work in the process during this time the
a fire helicopter carries a 520-kg bucket of water at the end of a 200-m long cable flying back from a fire at a
a car is traveling at 440 kmh on a flat highwaya if the coefficient of friction between road and tires on a rainy day
consider a small car of mass 1236 kg and a large sport utility vehicle suv of mass 3960 kg the suv is traveling at the
you are pushing a refrigerator across the floor of your kitchen you exert a horizontal force of 297 n for 74 s during
two objects have the same kinetic energy one has a speed that is 17 times greater than the speed of the other what is
a battery with a 12-v emf has a terminal voltage of 114 v when it delivers 20a to the starter of a cara draw a
a crate of mass 20 kg is pushed up a ramp by a person as shown in the figure below the person pushes the crate a
a crate of mass 46 kg is pushed across a level floor by a person if the person exerts a force of 31 n in the horizontal
the electric field midway between two equal but opposite point charges is 755 nc and the distance between the charges
a system of 1454 particles each of which is either an electron or a proton has a net charge of -7456times10-17 chow
a neutron star is the remnant left after certain supernovae explosions of giant stars typically neutron stars are about
a 09-kg block begins to move when it is pulled by a rope on a horizontal surface by a 3-n force the coefficient of the
an object at rest on a flat horizontal surface explodes into two fragments one seven times as massive as the other the
two long parallel wires each carry 23a in the same direction with their centers 15cm apartfind the magnitude of the
you are standing on a scale inside an elevator the scale reads 112 percent of your weight what is the acceleration of
two electrons are located at two of the vertices of an equilateral triangle one at each vertex the length of one side
a closely wound circular coil with a diameter of 480 cm has 625 turns and carries a current of 0540 a what is the
a concave mirror forms an image on a screen twice as large as the object both the object and the screen are then moved
josh starts his sled at the top of a 29m -high hill that has a constant slope of 25 degrees after reaching the bottom