Showing 51 to 60 of 381 Questions
  • A copper cube measures 6.00 cm on each side. The bottom face is held in place by very strong glue to a flat horizontal surface, while a horizontal force F is applied to the upper face parallel to one of the edges. (Consult Table 11.1) (a) Show that the glue exerts a force F on the bottom face that is equal but opposite to the force on the

  • A copper rod of length l is suspended from the ceiling by one of its ends. Find: (a) The elongation Δl of the rod due to its own weight; (b) The relative increment of its volume ΔV/V.

  • A Couple two forces equal in magnitude and opposite in direction, acting on an object at two different points, form what is called a couple. Two ant parallel forces with equal magnitudes F, = F2 = 8.00 N are applied to a rod as shown in Fig. 11.32.(a) What should the distance I between the forces be if they are to provide a net torque of

  • A crate, in the form of a cube with edge lengths of 1.2 m, contains a piece of machinery; the center of mass of the crate and its contents is located 0.30 m above the crate's geometrical center. The crate rests on a ramp that makes an angle θ with the horizontal. As θ is increased from zero, an angle will be reached at which the

  • A crutch is pressed against the sidewalk with a force Fc along its own direction as in Figure. This force is balanced by the normal force Fn and a frictional force fs.

  • A cube of mass M leans against a frictionless wall making an angle q with the floor as shown in Figure. Find the minimum coefficient of static friction ms between the cube and the floor that allows the cube to stay atrest.

  • A cube of side l rests on a rough floor. It is subjected to a steady horizontal pull. F, exerted a distance h above the floor as shown in Fig. 9-81. As F is increased, the block will either begin to slide, or begin to tip over. Determine the coefficient of static friction μs so that. (a) The block begins to slide rather than tip;

  • A cubical box is filled with sand and weighs 890N. We wish to "roll" the box by pushing horizontally on one of the upper edges.(a) What minimum force is required?(b) What minimum coefficient of static friction between box and floor is required?(c) If there is a more efficient way to roll the box, find the smallest possible force that woul

  • A cylinder of mass M and radius R rolls against a step of height h as shown in Figure. When a horizontal force F is applied to the top of the cylinder, the cylinder remains at rest. (a) What is the normal force exerted by the floor on the cylinder? (b) What is the horizontal force exerted by the corner of the step on the cylinder? (c) Wha

  • A cylinder of weight W is supported by a frictionless trough formed by a plane inclined at 30o to the horizontal on the left and one inclined at 60o on the right as shown in Figure. Find the force exerted by each plane on thecylinder.