Chapter 8 - Potential Energy and Conservation of Energy - Problems and Conceptual Exercises - Page 247: 40

$W=1300J$

We know that $W=E_f-E_i$ $\implies W=(\frac{1}{2}mv_f^2+mgy_f)-(\frac{1}{2}mv_i^2+mgy_i)$ $W=m[\frac{1}{2}(v_f^2-v_i^2)+g(y_f-y_i)]$ We plug in the known values to obtain: $W=(77)[\frac{1}{2}(8.2^2-1.3^2)+(9.81)(0-1.65)]$ $W=1300J$