1.) A solid ball is released from rest and slides down a hillside that slopes do

Question

1.) A solid ball is released from rest and slides down a hillside that slopes downward at an angle 51.0 from the horizontal.

Part A

What minimum value must the coefficient of static friction between the hill and ball surfaces have for no slipping to occur?

2.) Stuck on Part B
A 316-N, uniform, 1.15-m bar is suspended horizontally by two vertical cables at each end. Cable A can support a maximum tension of 461.0 N without breaking, and cable B can support up to 400.0 N . You want to place a small weight on this bar.

Part A
What is the heaviest weight you can put on without breaking either cable?
Answer = 545 N

Part B
Where should you put this weight?
Answer in meters

Explanation / Answer

sum of balancing forces = 0

W = 545 N
-

part B :

net torque about O = 0

545* x + 316 * 1.15/2 - 400 *1.15 = 0

x = 0.51 cm

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