Q. A cylinder of radius 250 mm and weight, W = 10 kN is rolled up an obstacle of height 50 mm by applying a horizontal force P at its centre as shown in the figure.
All interfaces are assumed frictionless. The minimum value of P is
(A) 4.5 kN (B) 5.0 kN (C) 6.0 kN (D) 7.5 kN
Ans: 7.5 kN
Sol:
When the roller will just start to roll up, then it will loose its contact at point X. only contact will be at point B.
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
