# Ii draw the fbd kd for block b fbd kd r 5 the force

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ii) Draw the FBD/KD for block B. FBD: KD: -r @
5. [~] The~force acting on a 1.2-kg body moving along an x-axis is shown below. The partIcle starts at x =0 m with an initial velocity of 4 m/s. . .....345 o.-~-r-----+--l----';' x (m) " .................0 ................,,, a) What is the acceleration of the body when x = ~ i 3 m?
r b) What is the position of the body when it changes its direction?
6) .
D , r<~dx
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6.  For the system below, point A is fixed to the rope. At the instant shown, the relative velocity of block B with respect to point A, v81A' is directed at an angle below the usual positive x -axis (i.e. ~). At this ~aJ e instalJ.t, the speed of B is 2 mis, and point A is slowing at a rate 3 m/s2. I~~ ':Af-t ~I~ J Ii (' I 0 I "gvi!l I dJ At the instant shown, answer the following. For parts b)-d), express all answers as a magnitude and clearly-indicated directions. a) Does B move up or down? of ~. · f! 1-
" l B
b) Determine v A and ~onstra'O\Bd VB'
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