HCV: A small block of mass m is kept on a rough inclined surface of inclination fixed in an elevator

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A small block of mass m is kept on a rough inclined surface of inclination  fixed in an elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be
1. zero 2. mg vt cos2 
3. mgvt sin2  4. mgvt sin 2

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🥲it way easy questions 😕I am not Able to solve it

anshsrivastava