A0.10 kg meter stick is held perpendicular to a vertical wall by a 2.5 mm string going from the wall to the far end of the stick.
(a) find the tension in the string.
(b) if a shorter string is used, will its tension be greater than, less than, or the same as that found in part (a)?
(c) find the tension in a 2.0 m string.

Explanation:

a)

Sum of moments = 0 (Equilibrium)

T . cos (Q)*L = m*g*L/2

b) If the String is shorter the Q increases; hence, Cos Q decreases which in turn increases Tension in the string due to inverse relationship!

c)

the force required to move the cart is divided by three or 33.33 n.

okay i have so many questions. but the big one here is: um wt..f is this mess? ?