A ball is launched with 100 / initial velocity and at an angle 250 to strike the ground at distance from the tower as shown in figure. Neglecting the air resistance, find (i) The maximum height the ball will rise from the ground, (ii) the horizontal distance it will travel just before it strikes the ground and (iii) the velocity and angle with which it will strike the ground.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?