Question

(a) In Cartesian coordinates, the unit vectors r and φ are related to the unit vectors x and y by Using these expressions, and r-rr, derive Eqs. (1.48) for Fr and Fo: F, m(ř_rơ), = 1.48: (Unlike r and ф. æ and y do not change with time.) (b) Consider a particle that feels an angular force only, of the form Fo mro. (There is nothing physical about this force; it simply makes the F-ma equations solv- able.) Show that i - VA logr + B, where A and B are constants of integration, determined by the initial conditions. (Note that you will also need the equation Fr 0 to solve this system.)

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