Question: Slider block B starts from rest and moves to the right with a constant

Question

Question: Slider block B starts from rest and moves to the right with a constant acceleration of 1 ft/s^2. Determine (a) the relative acceleration of portion C of the cable with respect to slider block A, (b) the velocity of portion C of the cable after 2 sec.


Slider block B starts from rest and moves to the right with a constant acceleration of 1 ft/s^2. Determine (a) the relative acceleration of portion C of the cable with respect to slider block A, (b) the velocity of portion C of the cable after 2 sec.

Explanation / Answer

As stated above, 2Aa=3Ab Since one end of the cable is connected to the wall, the acceleration of any point on section C will be the same as the accelleration of block B this would mean that Ac=Ab   

2Aa=3Ac

Ab=3/2 Ac

therefore, after 2 seconds section C is moving at 2ft/second.

1ft/sec^2 *2 sec = 2ft/sec

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