A non-uniform bar PQ is 50\,\text{cm} long and has weight 200\,\text{N}. A block of weight 400\,\text{N} is fixed at the centre of the bar. The bar is supported on horizontal ground. An upward vertical force of 360\,\text{N} is then applied at end Q and is just enough to raise end Q clear of the ground. What is the distance from the centre of gravity of the bar to end P?
- A$0.050\,\text{m}$
- B$0.10\,\text{m}$
- C$0.25\,\text{m}$
- D$0.40\,\text{m}$