A collar with a mass of m can slide along a smooth (frictionless) shaft with angle α measured from horizontal direction. The collar is attached to a light spring with stiffness k and unstarched length a. The other end of spring is attached to a fixed point). The collar starts from rest in A when it is pulled by a force P which is constant. P is at an angle β measured from the shaft. β is constant as well. Find the speed vB of the collar in the time instant it is at point B. (Given Parameters: m, a, b , k, P, α, and β)

I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)