You are on a school bus driving north at 20 m/s. you walk toward the back of the bus with a velocity of 6 m/s. what is your velocity relative to the road?
a. 6 m/s south
b. 14 m/s north
c. 20 m/s north
d. 26 m/s north

A50.0-n box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. you observe that at one instant the box is sliding to the right at and that it stops in 2.25 s with uniform acceleration. what magnitude force does friction exert on this box

What is the measure of a change in an objects velocity?

What organization and environment is described above?