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a 05 kilogram rubber ball is dropped from a height of 30 meter above a hard concrete ground after striking the ground
in the figure below sources a and b emit long-range radio waves of wavelength lambda 430 m by the phase of the emission
a 75 kilogram astronaut is space walking outside the space shuttle and pushes a 400 kilogram satellite away from the
a skier races down an 11o ski slope during a 6 s interval the skier accelerates at 13 ms2 find the horizontal component
a railroad car of mass 240 xnbsp104nbspkilogram moving at 350 ms collides and couples with two coupled railroad cars
a person with a boat wants to cross a river 1 mile wide flowing with a current 8 mihr the boat has a speed in still
the rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water the sudden
a simple electric motor consists of a150 turn coil 30 centimeter in diameter mounted between the poles of a magnet that
you have a summer job working for a major manufacturer of audio components the lead designer of loudspeakers asks you
a shell is fired from the ground with an initial speed of 160 times 10 meter cubed per second approximately five times
a ball on the end of a string is revolved at a uniform rate in a vertical circle of a radius 720 centimeter if its
the fastest recorded pitch in major league baseball was thrown by nolan ryan in 1974 if this pitch were thrown
find the acceleration of a 1400 kilogram car if it can stop from 35kmh on a dime 17centimeter find the force felt by
if the mass of a wheel is increased by a factor of 20 and the radius is increased by a factor of 3 find by what factor
a baseball player slides into third base with an initial speed of 780 ms if the coefficient of kinetic friction between
a woman stands between a vertical mirror 12 meter tall and a distant tree whose height is h she is 10 meter from the
spaceman notices that his landing gear have compressed 87centimeter on earth when his rocket ship is at rest when he
a projectile is launched with a speed of 40 ms at an angle of 60 degree above the horizontal use conservation of energy
a swing is made from a rope that will tolerate a maximum tension ofnbsp60nbspxnbsp102nbspn without breaking initially
a 1700 kilogram van delivers energy to its drive wheels at the rate of 35 kw ignore air resistance find the greatest
a space vehicle is coasting at a constant velocity of 215 ms in the y direction relative to a space station the pilot
a 14 gram coin slides upward on a surface that is inclined at an angle of 18o above the horizontal the coefficient of
a circular loop in the plane of the paper lies in a 07 t magnetic field pointing into the paper the resistance of the
a learner throws a set of keys vertically upward to his friend who is in a window 400 meter above his friends
a set of crash tests consists of running a test car moving at a speed of 124 ms 277 mihr into a solid wall strapped