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on a frozen pond a 10 kilogram sled is given a kick that imparts to it an initial speed of v 20 ms the coefficient of
a ball of mass 0140 kilogram is dropped from rest from a height of 125 meter it rebounds from the floor to reach a
a wind turbine is initially spinning at constant angular speed as the winds strength gradually increases the turbine
water falls without splashing at a rate of 0280 ls from a height of 210 meter into a 0670 kilogram bucket on a scale if
a projectile is launched with a speed of 40 ms at an angle of 60o above the horizontal use conservation of energy to
a resistor of resistance 8 x 104 ohm and a capacitor c 12muf are connected in series with a 240 volt power supplya
a 123 kilogram test rocket is fired vertically from cape canaveral its fuel gives it a kinetic energy of 1930 joule by
consider two string- suspended balls both with a mass of 015 kilogram one ball is pulled back in line with the other so
a laptop communicates with a router wirelessly by means of radio signals the router is connected by cable directly to
the earth spins on its axis once a day and orbits the sun once a year 36524 days in each case take the positive
at an accident scene on a level road investigators measure a vans skid mark to be 86 meter long it was a rainy day and
an explosion breaks an object initially at rest into two pieces one of which has 22 times the mass of the other if 8000
a jet is circling an airport control tower at a distance of 210 kilometer an observer in the tower watches the jet
a place kicker must kick a football from a point 36 m from the goal as a result of the kick the ball must clear the
the coefficient of kinetic friction for a 22 kilogram bobsled on a track is 010 find what force is required to push it
two dogs fight over a bone the larger of the two pulls on the bone to the right with a force of 42 newton the smaller
the front 120 meter of a 1300 kilogram car is designed as a crumple zone that collapses to absorb the shock of a
a tennis player receives a shot with the ball 00600 kilogram traveling horizontally at 540 ms and returns the shot with
a sun yacht is a spacecraft with a large sail that is pushed by sunlight although such a push is tiny in everyday
pete slides a crate up a ramp at an angle of 231 degree by exerting a 138 newton force parallel to the ramp the crate
the atom in a regular crystal can act as slits for light of the appropriate wavelength how do you think someone could
a brick is thrown upward from the top of a building at an angle of 15 degree to the horizontal and with an initial
tom the cat is chasing jerry the mouse across a table surface 13 meter off the floor jerry steps out of the way at the
a 2250 kilogram car traveling at 100ms collides with a car of mass 2750 kilogram that is initially at rest at a
two blocks of masses 20 kilogram and 8 kilogram are connected together by a light string and rest on a frictionless