Count the quantities

Exercise and reference answers

Questions

1. Answer

   2

   Question

   How many vectors are multiplied in a cross product?

2. Answer

   9

   Question

   ab sin theta with theta = 90 and a = b = 3. What is it?

3. Answer

   2

   Question

   How many types of motion can a free rigid body combine?

Instructions

Work it out, key the number in, then press enter.

Explanation