1. A series LCR circuit with L=2H, C=2mF and R=20 is driven by a generator with maximum emf of 10 V and variable frequency,
a) write down the complex impedance of the circuit,

A12-g wad of sticky clay is hurled horizontally at a 100-g wooden block initially at rest on a horizontal surface. the clay sticks to the block. after impact, the block slides 7.5 m before coming to rest. if the coefficient of friction between the block and the surface is 0.65, what was the speed of the clay immediately before the impact?