Thursday
December 18, 2014

Posts by jimmyjonas


Total # Posts: 8

physics
7.If a washing machine's drum has a radius of 28 cm and spins at 4.1 rev/s, what is the strength of the artificial gravity to which the clothes are subjected? Express your answer as a multiple of g.
February 22, 2011

physics
7.A turntable reaches an angular speed of 33.3 rpm, in 2.1 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? b How many revolutions does the turntable make during this time interval?
February 22, 2011

physics
6.A child pushes a merry go-round from rest to a final angular speed of 0.46 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 1.3 revolutions. What is the angular acceleration of the merry go-round?
February 22, 2011

physics
5.A car approaches the top of a hill that is shaped like a vertical circle with a radius of 55.5 m. What is the fastest speed that the car can go over the hill without losing contact with the ground?
February 22, 2011

physics
4.A 30.8-kg child swings on a rope with a length of 6.29 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.2 m/s. What is the tension in the rope?
February 22, 2011

physics
3.A roller coaster has a vertical loop with radius 27.1 m. With what minimum speed should the roller coaster car be moving at the top of the loop so that the passengers do not lose contact with the seats?
February 22, 2011

physics
2.A spy satellite is in circular orbit around Earth. It makes one revolution in 6.02 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?
February 22, 2011

physics
Two satellites are in circular orbits around Jupiter. One, with orbital radius r, makes one revolution every 17 h. The other satellite has orbital radius 4.2r. How long does the second satellite take to make one revolution around Jupiter?
February 22, 2011

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