Given,
A young girl drags her favorite dolly by the hair at an angle of 55° to the
ground for a distance of s= 4 m.
To find
a. The work done
b. The girls power
Step-by-step explanation
a. We know work done is given by

So

b. We know power is work done per unit time
Thus

Conclusion
a. The work done is 6.88J
b. The power is 0.22 W