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In the figure below, a uniform rod of mass 4 kg is free to pivot about the wall at a point P. It is supported by a string which hangs at an angle of Φ = 45° to the horizontal as shown. If the rod is at rest the tension in the string is?
My professor today stated that if a ball was to fall a certain height, then the work done by gravity on the ball would equal the work done by the ball's equal and opposite gravitational pull. By W=F*d, this means that the earth must travel the ..
A block of iron at 43.0°C has mass 2.30 kg. If 3.50×104 J of heat are transferred to the block, what is its resulting temperature
q1. a long hollow cylindrical conductor inner radius 2.0 mm outer radius 4.0 mm carries a current of 13 a distributed
a skier is gliding along at 2.0 ms on horizontal frictionless snow. he suddenly starts down a 12deg incline. his speed
The box of a well-known breakfast cereal states that one ounce of the cereal contains 107 Calories (1 food Calorie = 4186 J). what is the weight of the heaviest barbell
A block of mass M = 5.90 kg, at rest on a horizontal frictionless table, is attached to a rigid support by a spring of constant k = 5960 N/m. find the amplitude of the resulting simple harmonic motion
A pole-vaulter is nearly motionless as he clears the bar, set 4.2m above the ground. estimate his acceleration as he comes to rest on the pad
A thin uniform rod (mass = 0.75 kg) swings about an axis that passes through one end of the rod and is perpendicular to the plane of the swing. What is the maximum kinetic energy of the rod as it swings
You've always wondered about the acceleration of the elevators in the 101 story high Empire State Building. What is the magnitude of the acceleration as the elevator starts upward
A block of mass 2.0 kg is pushed against a vertical wall by a horizontal push (P) of 50.0 N. Find the force AND the direction of the friction
A merry go round consists of a flat disk mounted horizontally. What is the angular acceleration of the ride
Two long parallel wires carry currents of 3.57 Amp and 4.77 Amp. Evaluate what the separation distance of the wires expressed in millimeters
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