Cross Product and Moment of a Force

Select the answer for each of the following questions, then press "Mark" at the bottom of the page to receive feedback.
A pen and paper may be required to assist in the answering of some questions.
Questions beginning with "cont...." follow on from the previous question.


1) Select the answer that represents the result of the vector cross product.

i x k = ?

One answer only.
   j
   -i
   -j
   0
   None of the above

2) Select the answer that represents the result of the vector cross product.

2k x 6k = ?

One answer only.
   12i
   0
   12j
   12k
   None of the above

3) Select the answer that represents the moment of the force about point 0.

MO = ?

One answer only.
   200 Nm clockwise
   400 Nm clockwise
   0
   200 Nm anticlockwise
   None of the above

4) Select the answer that represents the moment of the 100N force about point O.

MO = ?

One answer only.
   20 Nm clockwise
   40 Nm clockwise
   60 Nm clockwise
   80 Nm clockwise
   None of the above

5) Select the answer that represents the moment of the 100N force about point O.

MO = ?

One answer only.
   200 Nm counterclockwise
   200 Nm clockwise
   0
   None of the above

6) Use the vector cross product and compute the moment of the 100-N force about point O.

MO = ?

One answer only.
   (70.7 k) Nm
   (141.4 k) Nm
   (-141.4 k) Nm
   (-70.7 k) Nm
   None of the above

7) Calculate the moment of the force about point O using the vector cross product and select the correct answer.

MO = ?

One answer only.
   (20i - 30k) Nm
   (60i - 30k) Nm
   (60i - 30j) Nm
   (60i + 40j - 30k) Nm
   None of the above

This test has been created using the CASTLE Toolkit