A mass of 1400 kg rests on an oak beam. The beam rests on 200-mm diameter rollers. Assuming the coefficient of rolling resistance between the beam and the rollers to be 0.90 mm, what horizontal force is necessary- to move the load on a level surface?

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle 0 = 44° by a brace that is attached to a pin. The beam has a weight of 340 N. Three additional forces keep the beam in equilibrium. The brace applies a force P to the right end of the beam that is directed upward at the angle e with respect to the horizontal. The hinge applies a force to the left end of the beam that has a horizontal component H and a vertical component V. Find the magnitudes of these three forces. Вeam Hinge Pin Brace (a) V = i (b) P = i (c) H = i > > >

The Tethered Satellite in shown has a mass of 525 kg and is at the end of a 20.0 km long, 2.50 mm diameter cable with the tensile strength of steel.        (a) How much does the cable stretch if a 100 N force is exerted to pull the satellite in? (Assume the satellite and shuttle are at the same altitudeabove the Earth.)                                                                                                (b) What is the effective force constant of the cable? (c) How much energy is stored in it when stretched by the 100 N force?

The figure below shows a horizontal rod, of length 7.4 m, with forces acting on it. A 30 N force acts at its left end, point O, in a direction down and to the left, 45° below horizontal. A 25 N force acts at its center, point C, in a direction up and to the right, 30° to the right of vertical. A 20 N force acts at the right end, in a direction down and to the right, 20° below horizontal.   *a) What is the net torque (in N · m) on the rod about an axis through O perpendicular to the page? magnitude=  ____N · m direction= clockwise or counter clockwise   (b)What is the net torque (in N · m) on the rod about an axis through C perpendicular to the page? magnitude= ___ N · m direction= clockwise or counter clockwise