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a 700-kg block of ice released fromrest at the top of a 175-m-longfrictionless ramp slides downhill reaching a speed
brass is an alloy of copper and zinc does the addition of zincto copper cause an increase or decrease in the speed of
particles approximately 30 x 10-2 cm in diameter are tobe scrubbed loose from machine parts in an aqueous
two hydrogen atoms travelling at the same speed collide headon the collision brings both atoms to a halt
a copper cylinder 150m long and 400cm in diameter stands onone enda what is the mass of the cylinderb what force does
a pendulum is not perfect simple harmonic motion derive theequation for the period of a pendulum from the equation for
two bullets have masses of 29 gand 42 g respectively each is fired with a speed of 420msa what is the kinetic energy
a cube of ice whose edges measure 210mm is floating in a glass of ice-cold water with one of its facesparallel to the
through a pipe 170 cm in diameterwater is pumped from the colorado river up to grand canyon villagelocated on the rim
a diver can change his rotational inertia by drawing his arms andlegs close to his body in the tuck position after he
figure skater is spinning at a rate of 10 revs with her armsoutstretched she then draws her arms in to her
in the movie terminator arnold schwarzenegger lifts someone up bythe neck and with both arms fully extended and
a ferris wheel rotates because a motor exerts a torque on thewheel the radius of the london eye is 675 m and its mass
which one of the following situations results in the largestmagnitude torque acting on a rigid objecta a force of
a bicycle has wheels of radius 032 m each wheel has a rotationalinertia of 0080 kgm2 about its axle the total mass of
the radius of a typicalhuman eardrum is about 40 mm find the energy persecond received by an eardrum when it listens to
a uniform rod of length l rests on a frictionless horizontalsurface the rod is pivoted about a fixed frictionless axis
a 124 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface after impact
a collision between two pucks on an air-hockey table puck a has a mass of 0025 kg and is moving along the x-axis with a
a 17 g bullet is accelerated in a rifle barrel 734 cm long to a speed of 493 ms use the work-energy theorem tofind the
workers are dragging a 610kg block up a dirt ramp that isinclined at 13o above the horizontal they are exertinga 5600-n
a coal power plant with 30 efficiency burns 10 million kilogramsof coal a day take the heat of combustion of coal to be
a parallel-plate capacitor has a plate separation of 50 cm if thepotential difference between the plates is 2000 v
suppose a charge q is placed on earth and another charge q isplaced on the moona find the value of q needed to balance
a driver releases an air bubble of volume 20 cm3 from adepth of 15 m below the surface of a lake where the temperature