I can\'t wrap my head around why bracket A has 2T acting on it to the right and

Question

I can't wrap my head around why bracket A has 2T acting on it to the right and not only 1T. Block B is moving to the right and its force has T to the left. Why would bracket A have 2T and not only 1T?

Thanks for explaining!

PROBLEM 12.31 A 10-lb block B rests as shown on a 20-lb bracket A. The coefficients of friction are , 0.30 and Hk0.25 between block B and bracket A, and there is no friction in the pulley or between the bracket and the horizontal surface. (a) Determine the maximum weight of block C if block B is not to slide on bracket A. (b) If the weight of block C is 10% larger than the answer found in a determine the accelerations of A, B and C

Explanation / Answer

Lets understand the concept of tension. In ideal case, in light string, the tension is uniform (say T). If this string is attached to an object, it pulls with the same force T. At B, the string is in contact at one location only, so force is T. But in case of A, it is at contact at top point as well as bottom point of the pully, so 2T is acting.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.