A metallic cube of side length `1.5m` and of mass `3.2` metric ton is on horizontal rough floor. The minimum horizontal force that should be applied on the cube at a height `1.2m` from that floor to turn the cube about its lower edge is

Options

A. `1.96 xx10^(3)` N
B. `4.9 xx10^(3)` N
C. `1.96 xx10^(4)` N
D. `4.9 xx10^(4)`N

Answer

C

Explanation

`tau_(cw) = tau_(Acw) , F xx1.2 = mg xx L/2 , F = 1.96 xx 10^(4)N `