An airplane flies northwest for 250 mi and then west for 150 mi. what is the resultant displacement of the plane after this time?

371.564 mi

Explanation:

Given

Airplane flies northwest for 250 mi and then travels west 150 mi

That is first it travels 250cos45 in - ve x direction and simultaneously 250sin45 in y direction

after that it travels 150 mi in -ve x direction

So its position vector is given by

so magnitude of displacement is

|r|=371.564 mi

no. dot product   =0 when vecs at right angles

answer: d. objects on jupiter experience more gravity due to more gases