Physics torque vs force combos? A uniform rigid rod rests on a level, frictionle
ID: 2113337 • Letter: P
Question
Physics torque vs force combos? A uniform rigid rod rests on a level, frictionless surface. The diagram below indicates four different combinations of (1) net force on the rd, and (2) net torque on the rod about its center of mass. In each box, draw vectors that represent one or two forces that achieve the given combination of net force and net torque. If any combination is not possible, state so explicitly. For example: In the second case, indicate one or two forces that could be exerted on the rod so that at the instant shown the net force on it is zero, but the net torque on it is not zero. 1) Fnet = 0, Torque = 0 2) Fnet = 0, Torque > 0 3) Fnet > 0, Torque = 0 4) Fnet > 0, Torque > 0
Explanation / Answer
1) two forces same mag. acting of COM
2) two forces acting at end points...forming couple...(same mag. opp direction)
3) two forces acting at end points...same mag. same direction
4) single force acting on rod anywhere other than COM