a) What minimum force F is required to prevent the block from sliding down the wall? b) What minimum force F is required to start the block moving up the wall?
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The weight of the block in the drawing below is 65 N. The coefficient of static friction
between the block and the wall is 0.720.
a) What minimum force F is required to
prevent the block from sliding down the wall?
b) What minimum force F is required to
start the block moving up the wall?
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- A 375-lb block rests on a rough plane inclined 35o with the horizontal. If thecoefficients of friction between the block and the plane are 0.58 for static and 0.3 for kinetic respectively, determine whether or not the block is at rest.Will the 200N block shown in the figure be held in equilibrium by the force of 160N? The coefficient of static friction is 0.3. What is the actual friction force based on your calculation? P 45° Solution: A 1. There are in total 2. EF, = 0: N y 3. Fx = 0: fquired= 4. Maximum static friction fm = forces on the block, with the frictional force point to the 5. Hence the block will N; N; N; 6. The actual friction froce on the contacting surface is NTwo boxes are stacked as shown in the diagram below. The bottom box has a mass of 3.5 kg and the top box has amass of 1.5 kg. They are pushed up a ramp inclined at 15° by an applied force of 25 N, applied to the lower boxand directed parallel to the ramp. The coefficient of kinetic friction between the ramp and the bottom box is 0.12.Determine the minimum coefficient of static friction required to keep the top box in place on the bottom box.
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