A wedge with an inclination of angle? rests next to a wall. A block of mass m is sliding down the plane, as shown. There is no friction between the wedge and the block or between the wedge and the horizontal surface. Find the magnitude, F(net), of the sum of all forces acting on the block. Find the magnitude, F(ww), of the force that the wall exerts on the wedge.

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determine the normal force nc that the crate exerts on the wedge when the system is at rest.

The crate shown is held against wedge B by a spring. The spring is 96.0% of its original uncompressed length l=3.00 m, and the spring constant is given as k=1450 N/m. The coefficient of static friction at all contacting surfaces is =0.150. The mass of the crate is m=28.0 kg. The angle is =12.0deg. Neglect the mass of the wedge. Assume the crate only moves in the y-direction and that wedge A can not move. Determine the normal force Nc that the crate exerts on the wedge when the system is at rest. Determine the magnitude of the smallest horizontal force P that is necessary to begin moving the crate upward.

redfox51

A 9.5-kg block is sliding down a wall with constant velocity. The coefficient of static friction between the block and the wall is μs = 0.70. The coefficient of kinetic friction between the block and the wall is μk = 0.40. What is the magnitude of the force (in N) pressing the block against the wall? Use g = 9.79 m/s2.

cyanhound711

A wedge of mass m1 is firmly attached tothetop of a scale, as shown in the figure. The inclined surface ofthewedge makes an angle Î¸ with the horizontal. Now, a block ofmassm2 is placed on the inclined surface of the wedge and allowedtoaccelerate without friction down the slope. a) show that thereadingon the scale while the block slides is (m1+m2 cos^2Î¸)g (also foundin figure).
b) Explain why the reading on the scale is less than(m1+m2)g.
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