An object moves at constant speed along a circular path in a horizontal plane, with the center at the origin. when the object is at –2.0 m, its velocity is –(4.0 m/s). in which direction is the object traveling? clockwise counterclockwise (b) what is the object’s velocity at 2.0 m?

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".