In the pulley system shown below, a 360 n weight is slowly lifted. assuming the system is 100% efficient and each pulley is weightless, what is the minimum input force needed to lift the weight? rope pile l= 16.74m a. 61 n b. 121 n c. 181 n d. 361 n

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 26 mm and 103 mm. the electric potential of the inner conductor with respect to the outer conductor is - 700 v (k = 1/4πε 0 = 8.99 × 109 n · m2/c2) the energy stored in a 1.0-m length of this capacitor is closest to