A hiker walks 3 km north, 4 km east, and 6 km south. What is the magnitude of the resultant displacement of the hiker?

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.

Which is a substance that can be separated by physical means and is not the same throughout

What is part of a line has one endpoint and continues in one direction?