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A box of mass 3 kg sits on a table. Neglect friction. You pull on a string tied to the right side of the box, exerting a force of 20.0 N at an angle of 30.0 degrees above the horizontal. Your friend exerts a horizontal force of 12.0 N by pulling on a string on the other side of the box. The box is moving with constant velocity. Calculate the coefficient of friction with the surface.
A bumper car with mass m1 = 102 kg is moving to the right with a velocity of v1 = 4.9 m/s. A second bumper car with mass m2 = 90 kg is moving to the left with a velocity of v2 = -3.3 m/s, What is the velocity of the center of mass of the system
Radioactive decay of granite and other rocks in the Earth's interior provides sufficient energy to keep the interior molten, heat lava, and supply warmth to natural hot springs.
A particle has an acceleration of 6.19 m/s^2 for 0.350 s . At the end of this time the particle's velocity is 9.26 m/s What was the particle's initial velocity?
An electron enters a region of space containing a uniform 0.0000201-T magnetic field. Find the radius of the electrons path, and the frequency of the motion
The rms current in a 44-? resistor is 0.50 A. What is the peak value of the voltage across this resistor
A 13.0 kg bucket of water of is suspendedby a rope wrapped around a pulley, which is just a solid cylinder0.300 m in diameter with mass 17.0 kg. The cylinder is pivoted on a frictionlessaxle through its center.
An ethernet cable is 4.15 m long and has a mass of 0.195 kg. A transverse pulse is produced by plucking one end of the taut cable. What is the tension in the cable
An Escort and a Camaro traveling at right angles collide and stick together. The Escort has a mass of 1200 kg, What was the speed of the Camaro
A 50 kg rock climber accidentally falls from the side of a rock and freefalls until she is stopped by her 9 m saftey rope. what was the average force felt by the rock climber
At a constant speed of 55 km/h , an automobile travels 600m along a straight highway that is inclined 5.0 degrees to the horizontal. What is the cars vertical velocity magnitude
The number density in a container of argon gas is 2.37·1025 m?3. The atoms are moving with an rms of 427 m/s. What is the temperature inside the container
A 300g rock tied to a string is rotated in a vertical circle (up and down, so gravity is important) with radius 0.5m. what is the rotation rate of the rock
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