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an electric motor can accelerate aferris wheel of moment ofinertia i 20000 kgmiddotm2 fromrest to 97 revmin in 120 s
a harp string plays the a above middle c vibrating at itsfundamental frequency of 440 hz the tension in the string
a cat is brought into a vets office you need to find itscenter of gravity you place its front legs on a scale thatreads
a 0185-kg ball is dropped from rest ifthe magnitude of the balls momentum is 0700 kg middot ms just before it lands on
a string wound around a cylinder of 10 cm radius has has a 150 gram mass attatched when released the mass accelerates
a wind turbine is initially spinning at a constant angular speedas the winds strength gradually increases the turbine
a fire helicopter carries a 620-kg bucket of water at the end of a 200-m-long cable flying back from a fire at a
a solid uniform ball rolls without slipping up a hill asshown in the figure at the top of the hill it is moving
a rollercoaster car starts at rest on top of a frictionless hill ofheight 17 m slides down to ground leveland then into
a large fake cookie sliding on a horizontal surface is attached toone end of a horizontal spring with springconstant k
a 40-kg object is attached to a springof spring constant 10 nm the object is displaced by 50 cm fromthe equilibrium
a factory worker moves a 260kg crate a distance of 520malong a level floor at constant velocity by pushing horizontally
a 628 kg canoeist stands in the middle of her canoe the canoe is 33 m long and the end that is closest to land is 25 m
in a ballistics test a 25 g bullet traveling horizontally at 1200ms goes through a 30 cm thick 350 kgstationary target
a young hockey player stands at rest on the ice holding a 11 kg helmet the player tosses the helmet with a speed of 58
a 650 kg woman stands at the rim of ahorizontal turntable having a moment of inertia of 485 kgmiddotm2 and a radius of
a bowling ball is of radius11 and and mass 72 rolls from rest down an inclined plane of length21 the angle of incline
to protect their young in the nest peregrine falcons will fly into birds of prey such as ravens as highspeed in one
the 20 m stick weighs 60 n and is suspended by support cords ateach end a 40 n weight is hung 040m from the left end
a 270 ml soda can is 527 cm in diameter and has a mass of 234 g such a soda can half full of water is floating upright
if a communications satellite needs to be 36000 km above theequator how fast must it travel to remain at thatheighta
consider an airplanr wing area 20m2 if the airflow speed over the top of the wing is 200ms while the speed across the
a 15 kg block is dragged over a rough horizontal surface by a 70nforce acting at 20 degrees above the horizontal the
a 600 kg car is going around a curve with a radius of 120 m that isbanked at an angle of 250 degrees with a speed of
one of james bonds adversaries is standing on a frozen lake thereis no friction between his feet and the ice he throws