A 3.00*10^2 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 18.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 8.00 m.
(a) Find the work done by the pulling force.
(b) Find the work done by the kinetic frictional force.
i got part a which was w= f*x*cos(theta) and got 2282.5 but cant figure out part b please help
work done by friction?
forcefriction*distance
mu*(mg-3E2sin18)*distance
check my thinking.
Remember, the rope is pulling upward, so it reduces the normal force of weight.