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A 15 kg child sits on the edge of at 2 m radius, 200 kg merry go round. A father as been getting a little carried away and has pushed it up to a tangential velocity of 8.0 m/s. With no harm being done, the child jumps off with a tangential velocity of -8.0 m/s so that he lands straight in the arms of his father (effectively giving him no angular momentum). What is the final angular velocity of the merry go round?
A 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity rel..
illustrate what is the magnitude of the normal force exerted on the car by the walls of the cylinder at point A (at the bottom of the vertical circle)?
A 3m-long, 300 steel beams extend horizontally from the point where it has been bolted to the framework of a new building under construction. A 73 construction worker stands at the far end of the beam. What is the magnitude of the torque about poi..
Gas is confined in a tank at a pressure of 11.9 atm and a temperature of 23.0°C. If two-thirds of the gas is withdrawn and the temperature is raised to 76.0°C
A juggling bag is thrown straight up into the air and is caught 3 s later, What is the initial velocity of the bag
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
A loudspeaker of mass 25.0 is suspended the distance of = 2.40 below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.50. What is the tension in each of cables.
A bat flying in a cave emits a sound and receives its echo 0.37s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)
Compute the camels eastward displacement
As a car approaching you driver lays on the horn. The horn has an actual frequency of 350Hz but you hear the horn as 390 Hz. What is the speed of the car.
A shot fired with a velocity 100 m/s on a direction making an angle 60 degree with vertical. Calculate the time of flight
Compute Earth's gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth's surface.
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