Question

A 2 kg book is sitting on a table. A 10 N force is pulling it to the right. A 3 N force is pulling to the left. What is the Net Force acting on the book? A. 2 N down B. 7 N to the right C. 13 N to the right D. 15 N to the right

Answer 1

Here's the 'vector equation' for that situation:

                  (10N right)  +  (3N left)

               = (10N right)  +  (-3N right)

               =     7N right .