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A rectangular block of square base (1 mx...

A rectangular block of square base (`1 mxx1 m`) and height `1.8 m` is moving with constant speed on a rough horizontal surface (`mu_(k)=0.5`) due to horizontal force `F` as shown. If the mass of block is `40 kg`, find
(a) the value of `F_(1)`
(b) the value of `h` at which the block just starts to tip
(c) If force `F` is applied at `h//2`, find the perpendicular distance of normal reaction from `O` (center of mass).

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