Question

For the rolling of the body the calculation of the moment of the force about the axis of rolling, the cross product table, i.e. the 3X3 matrix which is made for doing the cross product having 3 rows, contains three elements. Which are they from top to bottom?

(a) Axis coordinates, point coordinates, and the force coordinates

(b) Point coordinates, axis coordinates, and the force coordinates

(c) Axis coordinates, force coordinates, and the point coordinates

(d) Force coordinates, point coordinates, and the axis coordinates

I had been asked this question in an online quiz.

I need to ask this question from Rolling Resistance topic in division Friction of Engineering Mechanics

Answer 1

The correct option is (a) Axis coordinates, point coordinates, and the force coordinates

The best I can explain: The 3X3 matrix which is being made is having axis coordinates, point coordinates and the force coordinates. They are from top to bottom place. The order cannot be changed. Or if changed then one needs to apply the negative sign appropriately. Negative because the directions get reversed.