(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A block of mass m is pulled along a rough horizontal surface by a constant applied force of magnitude F that acts at an angle theta to the horizontal. The acceleration is a. Express all algebraic answers in terms of m, F, theta, and a.

A. Derive an equation for the normal force

B. Derive an expression for the coefficient of friction between the block and surface.

Sketch the graphs of speed v and displacement x as teh functions of time if the block started at rest at x=0 and t=0

2. Relevant equations

Fy=(Applied force)(Sin(theta))

Fx=(Applied force)(Cos(theta))

Fnet=(mu)(Normal force)

3. The attempt at a solution

Well for part A, I figure that since it was being pulled at an angle that would provide for a lower normal force.

Normal Force=(Fg-Fy) *Fy is the y component of the force vector.

For the coefficient of friction, I don't know if I am supposed to derive an equation that soves for mu, or just the equation that factors in mu.

Here is what I have for part B:

Ff=u[Fg-Fy]

And for the graphs I am kind of lost. Thanks for any help!

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# Homework Help: Pulling mass on flat plane at an angle.

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