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a child slides down a snow-covered slope on a sled at the top of the hill her mother gives her a push at a speed of 15
an external force moves a 31-kg box at a constant speed up a frictionless ramp the force acts in a direction parallel
a 70-kg object is attached to one end of a horizontal spring that has a negligible mass and a spring constant of 300 nm
a 315-g model boat floats on a pond the wind on its sail provides a force of 16 n that points 20deg north of east the
a parallel-plate capacitor is constructed of two horizontal 180-cm-diameter circular plates a 17g plastic bead with a
the block moves 600m up along the plane with no friction while the force f with magnitude of 2000 n is acting on it1
a cart with mass 330 g moving on a frictionless linear air track at an initial speed of 21 ms undergoes an elastic
an object of mass 60 kg is thrown vertically upwards from ground level with an initial speed of 20 ms what is its speed
a skydiver mass 80 kg jumps out of an airplane traveling 150 kmh horizontally at an altitude of 1000 m when she reaches
a 17-kg suitcase falls from a hot-air balloon that is floating at a height of 333 m above the surface of earth the
an object is 14 mm from the objective of a certain compound microscope the lenses are 208 mm apart and the intermediate
a parallel-plate air capacitor of area a 260 cmnbspnbsp 2 and plate separation d 240 mm is charged by a battery to a
a helicopter is flying horizontally at a speed of 294ms over a hill that slopes upward with a 2 percent grade what is
a submarine dives to a depth of 50 meters in the ocean1 what is the gauge pressure at this depth2 what is the force
a firework has been launched into the air and explodes into three pieces magically the pieces explode in a
at one point in space the electric potential energy of a 10nc charge is 38j1 what is the electric potential at this
several 60w incandescent light bulbs are wired in one circuit protected with a 15a breaker the voltage of the household
a compact fluorescent light bulb cfl consuming 9 w electricity produces the same light output from a 40 w incandescent
the belt of a van de graff generator carries a surface charge density of 450 mcm2 the belt is 0500 m wide and moves at
an automotive battery has an emf of 120 v when supplying power to the starter motor the terminal voltage of the battery
an electron is accelerated during 2100 v from rest and then enters a uniform 160 t magnetic field1 what is the minimum
a 28 cm tall object is 28 cm to the left of a lens with focal length of 15 cm a second lens with a focal length of 18
a dentist wants a small mirror that when 200 cm from a tooth will produce an upright image that is 5 times larger what
an optical engineer needs to ensure that the bright fringes from a double-slit are 157 mm apart on a detector that is
1 a man of 500 kg mass is in equilibrium among two parallel plates the man is charged up to 130 mc of charge the