Arock is dropped straight off a bridge that is 9 meters above the ground and falls at a constant speed of 10 m/sec. another person is 12 meters away on the same bridge. at what rate is the distance between the rock and the second person increasing just as the rock hits the ground?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc