A 0.50 kg ball that is tied to the end of a 1.3 m light cord is revolved in a horizontal plane with the cord making a 30 angle, with the vertical (See Fig. P7.52.)

An electron is at rest just above the surface of a sphere with a radius of 2.6 and a uniformly distributed positive charge of 2.2 10 15 . Like a rocket blasting off from the Earth, the electron is given an initial speed radially outward from the sphere.

A uniformly charged ball of radius a and charge -Q is at the center of a hollow metal shell with inner radius b and outer radius c . The hollow sphere has net charge +2Q.

A small ball rolls around a horizontal circle at height y inside a frictionless hemispherical bowl of radius. Find an expression for the ball's angular velocity in terms of R, y and g. What is the minimum value of for which the ball can move in a circle? Express your answer in terms of...

"The pulley of an ideal Atwood\'s machine is given an upward acceleration a, as shown below. Find the acceleration of each mass and the tension in the string that connects them. The speeds of the two blocks are not equal in this situation. (Use the following variables as necessary:...

A small ball rolls around a horizontal circle at height y inside a frictionless hemispherical bowl of radius , as shown in the figure .