If the bar and block are too heavy, one of the strings may break. assuming that the two strings are identical, which one will break first? if the bar and block are too heavy, one of the strings may break. assuming that the two strings are identical, which one will break first? string a string b

In an experiment, how can i change human errors? be specific.

Why do astronauts in the space shuttle weigh less?

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".