Summary

Torque, Moment:

Cross Product(Vector Product):

Moment of a force-scalar formulation:

Moment of a force-vector formulation:

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

summary Real-life example quiz

1. Vectors with force systems:

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

1. Vectors with force systems:

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

2. Moment of a force When a machine element is loaded transversely, the loads cause

bending of the element * Skateboard acts as a simply supported beam

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

Skateboard acts as a simply supported beam

The bending produces deflection of the member. This deflection produces mechanical strain, which in turn produces mechanical stress (Hook’s law). When the stress developed exceeds the elas-tic limit of the beam material, the beam fails.

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

Given: The rectangular platform is hinged at A and B and supported by a cable which passes over A frictionless hook at E. The tension in

the cable is 1349N.

Week 2 Vectors with force system Resultants:

summary Real-life example quiz

Find: The moment about each of the coordinate axes of the force

exerted by the cable at C.

Week 2 Vectors with force system Resultants: