1. The problem statement, all variables and given/known data A 2.4-lb slider is propelled upward at A along the fixed curved bar which lies in a vertical plane. If the slider is observed to have a speed of 11.3 ft/sec as it passes position B, determine (a) the magnitude N of the force exerted by the fixed rod on the slider and (b) the rate at which the speed of the slider is changing (positive if speeding up, negative if slowing down). Assume that friction is negligible. 2. Relevant equations 3. The attempt at a solution For part a I drew a FBD of the slider and assigned the normal and tangential axes. I can also see that the normal force and the weight of the slider are the only forces acting on the slider. ƩFen = man = N - mgcos(31) m(v2/r) = N - mgcos(31) I then solved for N and I get 6.383 lbf I'm unsure about part b. Any suggestions?