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A 300 ball on a 70--long string is swung in a vertical circle about a point 200 above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 above the floor.
What was the tension in the string an instant before it broke?
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. Determine the magnitude of the oscillations
A mass of 3.90 kg is suspended from a 1.55 m long string. It revolves in a horizontal circle. Calculate the angle between the string and the vertical
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.650m from the axis of rotation of the stool. Compute the kinetic energy of the system after the dumbbells are pulled in
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.
A step-down transformer has 30 turns of wire on one coil and 1200 turns on the other. what is the required rms input voltage
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 505 nm, What is the intensity (in W/m^2) delivered to a rod
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 14.9 rad/s. What is the angular speed of the wheel at the higher temperature
A 1.00kg black (m) us on a frictionless plane inclined at 20 degrees. The block is attached to a spring (k = 25N/m) that is fixed to a wall at the bottom of the incline. how far does it drop before coming to rest
A box of mass 19.0 kg is sitting on a flat horizontal floor with a coefficient of static friction of 0.30 between the box and the floor. What minimum tension in the string is required for the box to just start moving
At the instant the car begins to accelerate, a truck with a constant velocity of 21 m/s passes in the next lane. Explain how far will the car travel before it overtakes the truck?
A small block with a mass of 0.170 kg is attached to a cord passing through the hole in a frictionless, horizontal surface .The block is initially revolving at a distance of 0.50 m from the hole with a speed of 0.80 m/s. The cord is then pulled from ..
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