Please solve parts B and C. A garage door is mounted on an overhead rail (the fi

Question

Please solve parts B and C.

A garage door is mounted on an overhead rail (the figure (Figure 1)). The wheels at A and B have rusted so that they do not roll, but rather slide along the track. The coefficient of kinetic friction is 0.55. The distance between the wheels is 2.00 m, and each is 0.50 m from the vertical sides of the door. The door is uniform and weighs 925 N. It is pushed to the left at constant speed by a horizontal force F. If the distance h is 1.43 m, what is the vertical component of the force exerted on the wheel A by the track? If the distance h is 1.43 m, what is the vertical component of the force exerted on the wheel B by the track?

Explanation / Answer

from part A, the force acting on the wheel at A is 98.7 N

Since the weight of the door is balanced by A and B so the vertical force ate B = 925 -98.7 N = 826.3N

for finding the maximum height as required in part C, we use the balance of torque around the edge, such that,

826.3*.5 = 0.55*2*925*hmax  

I am not sure I understood the problem correctly though since the statement of the problem is too small to read, it would be great if you could put up a clearer picture.

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