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a pile driver drives apost into the ground the mass of the pile driver is 2 500 kg andit is dropped through a height of
the picture below represents the crests of water wavesspreading out from a periodic disturbance in a pond the
determine the time it takes for a satellite to orbit earth in a circular near earth orbit a near earth orbit isone at a
a car speeds up as it turns from travelling due south to dueeast when exactly halfway around the curve the cars
a child holds a candy bar 100 cm in front of a convex mirror and notices that the image is only one-half the size of
an inquisitive physics student wishing to combine pleasurewith scientific inquiry rides on a rollercoaster sitting on
a boy coasts down a hill on a sled reaching a level surfaceat the bottom with a speed of 71 ms if the coefficient of
two tugboats pull a disabled supertanker each tug exerts aconstant force of 17times106 n one at an angle 180circ west
a sound is set up in a pipe closed at one end and open atthe other according to the formula given by dr willis in
a child holds a candy bar 100 cm in front of a convex mirror andnotices that the image is only one-half the size of
a system consisting of one positively charged particle and onenegatively charged particle is altered by an outside
a woman stands in an elevator that has a constant upwardacceleration while the elevator travels upward a distance of180
after falling from rest from a height of 30m a 053 kg ballrebounds upward reaching a height of 20m if the
the dipole moment of a water molecule in liquid water is 62times10minus30 cmiddotm and the effective diameter of a
a room has dimensions 258 m height times 589 m times 633m a fly starting at one corner flies around ending up at
a freight train has a mass of 13 107 kg if thelocomotive can exert a constant pull of 82 105 how long doesit take to
determine the tangetial and centripetal components of the netforce exerted on the car when its speed is 15 ms the cars
it is common to see birds of prey rising upward on thermalsthe paths they take may be spiral-like you can model the
a hot-air ballonist rising vertically with a constant velocityof 500 ms releases a sandbag at an instant when the
an event occursin system k at x 2m y35mz 35 m and t0 system k and k have their axes coincident attt0 and system k
three blocks of mass 20 kg 80kg and 150 kg are connected by light strings passing over frictionless pulleys the 20 kg
a crate is resting on a ramp that is inclined at an angleabove the horizontal as the angle is incrased the crateremains
a 205 kg log is pulled up a ramp by means of a rope that isparallel to the surface of the ramp the ramp is inclined
a girl is whirling a ball on a string around her head in ahorizontal plane she wants to let go at precisely the right