True or false about forces and moments A 315-N force F and a 70-Nm couple M are

Question

True or false about forces and moments

A 315-N force F and a 70-Nm couple M are applied to corner A of a block, as shown below. If F and M are instead represented by an equivalent force-couple system FR and MR acting at point D, then which of the following statements is true about FR and MR? FR = F and MR = M. FR = F and |MR| = 70 N m, but the direction of MR is different from that of M. MR = M and |FR| = 315 N, but the direction of FR is different from that of F. |FR|= 315 ? and |MR|= 70 N m, but the direction of MR is different from that of M, and the direction of FR is different from that of F. |FR| 315 ? and |MR| 70 N m, but the direction of MR is the same as that of M, and the direction of FR is the same as that of F. Fr = F, |MR| 70 N m, and the direction of MR is different from that of M. |FR| 315 ?, |MR| 70 N m, the direction of MR is different from that of M, and the direction of FR is the same as that of F. |FR| 315 ?, |MR| = 70 N m, the direction of MR is different from that of M, and the direction of FR is different from that of F. FR = F, |MR| 70 N m, the direction of MR is the same as that of M. None of the above

Explanation / Answer

a),d),e) are true

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