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sandmanvgc
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120. Is that what they were asking for? Is frictional force not what I calculated above?PhanthomJay said:But what’s the applied force in the horizontal direction
So it would be 0PhanthomJay said:Yes, for static friction, the friction force is less than or equal to uN, from equilibrium equation Newton’s first law. If the box is moving , then kinetic friction applies and the friction force is equal to uN,
Suppose the box was just resting there and there was no applied force at all. Using u =0.2, what would be the friction force for that situation?
Statics is a branch of mechanics that deals with the study of forces and their effects on objects that are at rest or in a state of constant motion.
The crate problem is a common example used in statics to demonstrate the principles of equilibrium and the calculation of forces acting on an object.
To solve for N, we need to first draw a free body diagram of the crate, identify all the forces acting on it, and then apply the principles of equilibrium (sum of all forces = 0) to calculate the unknown force N. In this case, we would set the equation as 132N + N = 0, and solve for N to get a final answer of -66N.
Yes, there are a few assumptions made in the crate problem. These include assuming that the crate is in a state of static equilibrium, neglecting the effects of friction and air resistance, and assuming that all the forces acting on the crate are either vertical or horizontal.
Understanding statics and being able to solve problems like the crate problem can be useful in various engineering and construction applications. It can help in designing structures that can withstand external forces, calculating the weight distribution on different parts of a structure, and ensuring overall stability and safety of a design.