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A particle of mass m is attached to the end of a light string of length l. The other end of the string is passed through a small hole and is slowly pulled through it. Gravity is negligible. The particle is originally spinning the round the hole with angular velocity w. Find the angular velocity when the string length has been reduced to 1/2 l. Find also the tension in the string when its length is r, and verify that the increase in kinetic energy is equal to the work done by the force pulling the string through the hole.
a 145 mass attached to a horizontal spring oscillates at a frequency of 4.00 . at the mass is at 4.40 and has 20.0 .
A thin lens is made of glass having an index of refraction of 1.50. one side of the lens is flat and the other convex by a radius of curvature of 30.0 cm. first find the focal length of this lens, then the location of the image of an object if the ob..
The suspension system of a 1800 kg automobile "sags" 14 cm when the chassis is placed on it. Estimate the values of the spring constant
Calculate the magnitude of B when the force on wire. The time constant of an RC circuit is 5.5 s. How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge.
A 266.0 gram handball moving at a speed of 5.4 m/s strikes a wall at an angle of 29.0 degree to the normal of the wall and then bounces off with the same speed at the similar angle. Find the average force exerted on the wall by the ball
The starter motor of a car engine draws a current of 200A from the battery. The copper wire to the motor is 4.60mm in diameter and 1.2 m long. How much charge passes through the starter motor
A 4.60 g bullet moving at 616 m/s strikes a 670 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 432 m/s. What is the speed of the bullet-block center of mass
A 1600·kg car traveling with a velocity of 6·m/s north collides head-on with a 3200·kg truck traveling with a velocity of 4·m/s south. What impluse is delivered to the truck by the car
A 5.66 microcoloumb and a -2.88microcoloumb charge are placed 16.9cm apart. Where can a third charge be placed
An electron with speed v0 = 1.7 multiplied by 106 m/s is traveling parallel toan electric field of magnitude E = 7.0 multiplied by 103 N/C. How far will the electron travel before itstops?
A28.0-kg block is initially at rest on a horizontal surface. A horizontal force of76.0N is required to set the block in motion, after which a horizontal force of57.0N is required to keep the block moving with constant speed.
For the vector A = - 8j + 4k, find its magnitude and direction. Also state in what plane the vector resides. Determine the vector product of each set of vectors
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