Alight string can support a stationary hanging load of 23.0 kg before breaking. an object of mass m = 2.95 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.791 m, and the other end of the string is held fixed as in the figure below. what range of speeds can the object have before the string breaks?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

How many atoms of nitrogen are in the chemical formula ni(w on

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.