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A solid cylinder of mass 148.7 kg and diameter 0.72m has mounted to rotate around its axis, with the axis parallel to the surface of the Earth. A very light rope is attached to the outside fo the cylidner, an spherical mass of 1.6 kg was attached to the end of the rope. A time t=0, the cylinder has an initial angular velocity of wi, and the mass is 26m below the cylinder but it's being lifted by the cylinder taking up the rope. When the mass is 2m below the cylinder, it stops (because of the infuence of gravity on the spherical mass), and then starts descending again. Calculate wi.
As the block has raised a vertical height of 0.725, the tension in the cord is 4.66 .What is the velocity of the bullet originally.
pipe open at one end only has a fundamental frequency of 237 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Currently, when both pipes vibrate at their fundamental frequencies, a beat ..
A train is travelling up a 4.8^circ incline at a speed of 3.25m/s while the last car breaks free and begins to coast without friction.
What are the size and direction of the change in velocity if the initial velocity is 6 m/s south and the final velocity is 2 m/s west?
How much of the rope must be pulled. Find the magnitude of the magnetic field at the point x = 0, y = 0.7 m, z = 0.
Decide about the validity of Ampere's Law. Ampere's Law is valid.
The spacecraft's mass is 291 kg and the thrust (force) of the rocket engines is 59 N. If the speed of the spacecraft should be decreased by 128 m/s, how long the engines should be fired. (Ignore the change in mass as a result of the rocket engines..
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.
The elevator is firstly at rest. How far does the elevator move even as accelerating to full speed from rest.
A professor's office door is 0.94 wide, 2.2 high, 4.0 thick; has the mass of 23, and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame. When the door is open and at rest, the door closer exerts a torque of 5..
How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175celsious? assume that their initial temperature is 21 celsious, that specific heat capacity of popcorn is 1650 j/kgcelsious, and ..
A baseball player runs 27.4meters from batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to the total distance traveled by the player,magnitude of the players total displacement from the batters ..
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