7. A Physics teacher wants to show static friction with the following arrangemen

Question

7. A Physics teacher wants to show static friction with the following arrangement. The angle of the incline is 26

A Physics teacher wants to show static friction with the following arrangement. The angle of the incline is 26 degree , and a m1 = 80.0-kg mass is connected by a lightweight pulley another mass m2 which he can vary by adding weight. The coefficient of static friction between the 80.0-kg block and the incline is 0.720. What is the smallest mass m2 that can be used to remain in this static condition? What is the largest mass m2 that can be used?

Explanation / Answer

let the mass be m.so,

a)mg=m1g(sin26-ucos26)

the value of m turns out to be negative .so the minimum value is 0.

b)mg=m1g(sin26+ucois26)

=86.84 kg

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