Ship a is located 4.2 km north and 2.7 km east of ship b. ship a has a velocity of 22 km/h toward the south and ship b has a velocity of 39 km/h in a direction 36 â° north of east. what are the (a) x-component and (b) y-component of the velocity of a relative to b?

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".