Block A weighing 100 kg rests on a block B and is tied with a horizontal string to the wall at C. Block B weighs 200 kg. The coefficient of friction between A and B is 0.25 and between B and the surface is 1/3. The horizontal force P necessary to move the block B should be `(g=10m//s^(2))`

Options

A. 1150 N
B. 1250 N
C. 1300 N
D. 1420 N

Answer

B

Explanation

`p ge f_(1) + f_(2)`
`p ge 0.25 m_(a) g + (1)/(3) (m_(A) + m_(b)) g`
`p ge 1250 N`