Question

a motorboat is driven across a river at 5km/h at right angles to a current flowing at 3.9km/h. What is the resulting speed of the motorboat?

Answer 1

When you add the two perpendicular vectors, the resultant vector will be the hypotenuse.

sqrt[(5^2) + (3.9)^2] = ___

Answer 2

6.34km/h