14-26. The catapulting mechanism is used to propel the 10-kg slider A to the right along the smooth track. The propelling action is obtained by drawing the pulley attached to rod BC rapidly to the left by means of a piston P. If the piston applies a constant force F= 20 kN to rod BC such that it moves it 0.2 m, determine the speed attained by the slider if it was originally at rest. Neglect the mass of the pulleys, cable, piston, and rod BC. B [

You need to find out the maximum NPV of a hypothetical iron ore open pit as shown below. The iron ore grade is 72% and recovery is 90%. The market price of iron ore is $100/ton. The ore and waste block size are 30 by 30 by 30 m3 and annul production of six blocks (mining + stripping) is there. The mining cost is $35/ton and the stripping cost is $25/ton. The density for the ore and waste is 4.5 ton/m3 and 2.5 ton/m3 respectively. Assuming initial investment $50 million the interest rate is 5% per year.