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a helicopter propeller blade starts from rest and experiences aconstant angular acceleration of 180rads2 find the speed
an 85-kg skier is sliding down a ski slope the slope makes an angle of 23degrees above the horizontal directiona what
a roller coaster starts from rest at top of a hill 700 m highthe car travels to the bottom of the next hillmeasuring
an iron bolt is used to connect two iron plates together the boltmust withstand shear forces up to about 3200 n
a cart loaded with bricks has atotal mass of 238 kg and is pulled at constant speed by a rope the rope isinclined at
the drawing shows a collision between two pucks on an air-hockeytable puck a has a mass of 00190 kg and is moving along
consider a long circular cylinder of radius r bisected by a planeparallel to the axis of the cylinder with the two
a 100-kg test rocket is fired vertically from cape canaveral its fuel gives it a kinetic energy of 1960-j by the time
an individual lifts a 95-kg weight to a height of 213 m when the weight is held overhead what is the potential energy
a 2 kg mass hangs motionless from a partially stretched spring having a spring constant of 191 nm what is the magnitude
a 50 g mass hanger hangs motionless from a partially stretchedspring when a 55 gram mass is added to the hanger the
a 20-kg rock that is initially at rest loses 407j of potential energy while falling to the ground calculate the kinetic
in a model ac generator a 501 turnrect angular coil 100 cm by23 cm rotates at 123 revmin in a uniform magnetic field
a student librarian lifts a 22-kg book from the floor to a height of 12-m he carries the book 80-m to the stacks and
a spring is resting vertically on a table a small box is droppedonto the top of the spring and compresses it suppose
begin with the appropriate law and derive an expression for the magnetic field at a point p a perpendicular distance r
the plane of a rectangular coil 40cm by 80 cm is perpendicular to thedirection of a magnetic field b-gt if the coil has
with an expert karate blow you shatter a concrete block consider your hand to have a mass of 7 kg to be moving 5 ms as
a railroad freight car mass 15000 kg isallowed to coast along a level track at a speed of 20 ms itcollides and couples
find the flux of the earths magnetic field of magnitude500 x 10-5 t through a square loop of area400 cm2 for the
a high-speed lifting mechanism supports a 815 kg object with a steel cable 350 m long and 400 cm2 incross-sectional
in your right hand you hold a grocery sack with a gallon of milk you left hand holds an identical grocery sack with a
a mass on a spring has a angular oscillation frequency of 281rads the mass has a maximum displacement when t 0s of
a magnetic field of strength 027 t isdirected perpendicular to a plane circular loop of wire of radius25 cm find the
a neutron star has a mass of 1030 kg and a radius of 5 kilometers a body is droped from a height of 20cm above the