BITSAT2014PhysicsWork, Power and EnergyActual
A small block of mass m is kept on a rough inclined surface of inclination fixed in a 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:
Options
- Azero
- Bmgvt ²
- Cmgvt ²
- Dmgvt 2
Correct answer
C. mgvt ²
Step-by-step solution
( W _ f = f S ) (=( mg )( )( vt ) ) (= mg ² vt )