Question
In Class Problems 1. An object is moving along a straight ine, along which we have defined the x-ais The figure below provides a graph of its posiion coordinate (x) as a function of time () POSITION x () vs. TIME t (sec) A) when is the object located to the right of the origin, where x > 0? When is it at the origin, where x-07 B) When is the object moving in the positive x direction? When is it moving in the -x direction? C) When is the object reversing its direction of motion? D) When is the object at rest (stopped, not moving)? When is it traveling the fastes B-12
Explanation / Answer
A) at point a it is at origin, except this point it at x>0
B) b/w c to e it is moving in +x as v = dX/dt = slope ( = tan(theta) ) of X vs t ,,,,,and it is +ive in c to e
C) a to c,,,,e to g..... slope is -tive => V is negative
D) a,c, e,g ( as slope= 0 at these points)