12. A 4 kg block A rests on the surface of a slant. The static coefficient of friction between the block and slant is. If an external force T ~ N(25, 0.1²) N is applied to pull the block, determine the probability that the block A may tip.

Solution

Solve the above equation, we obtain

Therefore

The probability that the block may tip is

Thus, we can construct function Y and the block might tip over when Y>0, where

Finally, we can obtain

Ans.