A body of mass `m` is moved up (slowly) the plane of verying slope by a tangential force upto height `h`. The coefficient of friction between the surface and the block is `mu`. Select correct option(s)A. The friction force on the block is Kinetic and variable in magnitudeB. From `A` to `B` work done by frication on the block is `-mumgx`.C. From `A` to `B` work done by frication on the block is `-mumgxsqrt(h^(2) - x^(2))`D. From `A` to `B` work done by `F` on the block is `mgh`.

A body of mass `m` is moved up (slowly) the plane of verying slope by

1.	A body of mass `m` is moved up (slowly) the plane of verying slope by a tangential force upto height `h`. The coefficient of friction between the surface and the block is `mu`. Select correct option(s)A. The friction force on the block is Kinetic and variable in magnitudeB. From `A` to `B` work done by frication on the block is `-mumgx`.C. From `A` to `B` work done by frication on the block is `-mumgxsqrt(h^(2) - x^(2))`D. From `A` to `B` work done by `F` on the block is `mgh`.
Answer» Correct Answer - A::B Since therer is relative motion the frication froce is kinetic. The shape is changing hence force is also changing.

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