A triangular wedge (A) has inclined surface making an angle `theta = 37^(@)` to the horizontal. A motor (M) is fixed at the top of the wedge. Mass of the wedge plus motor system is 3m. A small block (B) of mass `m = 1kg` is placed at the bottom of the incline and is connected to the motor using a light string. The motor is switched on and it slowly hauls block B through a distance `L = 2.0` meter along the incline. Calculate the work done by the string tension force on the wedge plus motor system. All surfaces are frictionless.

Answer

`1.92`