4. A rope pulling on a block from the right
makes an angle 3 with the horizontal. If
the coefficient of friction between the
surface and the block is , how much
work is done by the tension in the rope
as it moves the block D meters to right
at constant speed? Let m be the mass of
the block and g the acceleration due to
gravity
O
Duong cos B
(usin + cos)
(Digcos)
sin
Duong sin
ucos 8 + sin)
Dmg cos ß sin B