Each cart has a mass of 1 kg, but three of the carts also carry objects that contribute to their total mass. the total mass of each cart and the object it carries (if any) is indicated in the force diagrams below. which cart experiences the greatest rate of change in speed?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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".

Frequency of electromagnetic waves that a radio station is assigned is called