A shot-putter exerts an unbalanced force of 128 N on a shot giving it an acceleration of 19 m/s2. What is the mass of the shot?

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

In science and physics what is the standard unit of measure for speed?

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".