the 2nd dervitive is the following;
[cos(theta)+uk*sin(theta)]^2*(w*uk*[cos(theta)-uk*cos(theta)-sin(theta)-uk*sin(theta)]/([cos(theta)+uk*sin(theta)]^2)^2
i don't get the follwing line:
Thus, in order to evaluate the second derivative at \theta=\theta_{k}
, just keep the term including the derivative of the numerator
a)In terms of theta,µk and w calculate F.
b)for w=400 N and µk=.25, calculate F and theta ranging from 0 to 90 in
increments of 10.Graph F versus theta.
c)From the general expression in part (a) calculate the value of theta for which
the value of F, required to maintain constatnt speed, is a...