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a projectile is shot from the surface of earth by means of a verypowerful cannon if the projectile reaches a height of
consider a balloon of volume 21m3 that contains 39 moles ofhelium gas at a temperature of 288 k ifthe gas is compressed
a motor mass of 180kg sits on a horizontal 225 m masslessplank the motor is 100 m from one end of the plank find the
two blocks of mass 700 kg and 300 kg are placed in contact withone another on a smooth horizontal surface a cosnstant
a bedroom bureau with a mass of 37 kgincluding drawers and clothing rests on the floora if the coefficient of static
take east as the positive direction an 80 kg fisherman jumps from a dock into a 129 kg rowboat at rest on the west side
an aluminum rod is 185 cm long at 20 c and has a mass of 350g if 15000 j of energy is added to the rod by heat what is
a 120g iron container holds 150g of water all at 250 degreesc two objects are dropped into the water the firstobject is
before opening her parachute an 800-n skydiver reaches a terminal velocity of 120mph at this point what will her
a 45 caliber bullet of mass 162g strikes a stationary wood blockwith a mass of 500g at 331ms the wood block is attached
bill developed a space craft that artificial gravity it has a radius of 50m it starts rotating and attains a constant
a thin hoop a solid disk and a solid sphere all with the samemass start from rest and roll down a ramp without slipping
a satellite is kept in a circular orbit 30102kmabove the surface of the earth by the force of gravity atthis altitude
suppose an object is placed at the edge of a recordplayer the record player has a diameter 300cm and rotatesat 333 rpm
a certain freely falling object requires 165 s to travel the last 245 m before it hits the ground from what height
each croquet ball in a set has a mass of 051 kg the greenball traveling at 123 ms strikes the blue ball which is atrest
a circular coil of 180 turns has aradius of 130 cm a calculate the current that results in a magnetic dipole moment of
a boy on a 22 kg skateboard initially at rest tosses a 75 kg jug of water in the forward direction if the jug has a
a spring with k128 nm is compressed to a distance 20 pastequillibrium and is used to project a ball with mass 4
a student holds a tuning fork oscillating at 256 hz he walkstoward a wall at a constant speed of 133 msa what beat
the work to required to strech a certain spring by an elongation of 400 cm to an elongation of 500cm is 305 j ais the
a cable is lifting a construction worker and a crate the weights of the worker and crate are 965 and 1510 n
a vertical spring stores 0962 j in spring potential energy whena 35-kg mass is suspended from itaby what
a helicopter drops an inflatable raft to flood victims floating ina lake when the raft is released the helicopter is 50
a 1200 rm kg car moving at 88 rm kmh collides with a 7600rm kg truck moving in the samedirection at 65 rm kmh the two