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A 2.0 kg tether ball is attached to a vertical pole by a 1.5 m long rope. The ball is swung around the pole at an angle of 60 degrees from vertical. Draw a force- body diagram. Calculate the tension in the rope and the speed of the ball. If the speed of the ball doubles, how does the tension and angle of the rope change?
Consider two identical 25-micro-coulomb point charges, each of 18 mg mass. Let them initially be at rest, 80 cm apart. How fast (in m/s) will each charge be moving when the charges are very far apart
You set up an experiment with two polarizer screens on an optical bench and collect data for the intensity of the light at the detector as you vary the relative angle between the transmission axes of the polarizers. What is intensity of the light s..
A copper bar is moved to the right while its axis is maintained in a direction that is perpendicular to a magnetic field. what is the direction of the magnetic field
A 1000- kg car collides with a 1200- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car (in km/h)
At a coal-burning power plant a steam turbine is operated with a power output of 548 MW. At what rate must heat be supplied to the power plant by burning coal
Calculate the position that a lens should be placed in order to achieve the maximum magnification. The length between the object plane and the image plane is 50cm and are fixed ( meaning they are restricted). Only the lens can be moved. The focal ..
You do 116 J of work while pulling your sister back on a swing, whose chain is 5.0m long, until the swing makes an angle of 32.0° with the vertical
a solenoid with length of 2.71 m and N= 311 turns/m carries a current 2.63 A. It stores 2.57 J of energy. What is the cross-sectional area of the solenoid
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
What is the initial (horizontal) velocity of the ball. An airplane needs to reach a velocity of 203 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
A 160 g trick baseball is thrown at 63 km/h . It explodes in flight into two pieces, How much energy, in joules, do the pieces gain in the explosion
The potential difference between the surface of a 2.5cm -diameter power line and a point 1.6m distant is 4.1kV. What is the line charge density on the power line
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