Just a quick note on Problem 3/224...
Because there is initially no tension in the cable, the cart in this problem will not immediately move. To obtain the correct answer you will first need to compute the level of tension required to move the cart. The time at which this critical force level is obtained will then be used in your impulse and momentum relationship.
6 comments:
I used sum of the forces in the x direction to find T (tension). Now once I have T, how do I use that to find t (time at which the critical force level is obtained)?
Once you know the critical tension you have to use the graph. Find the equation of the curve. Then plug in that tension to get a time.
I get 25kN for the tension and i dont get what is my mistake, here is the equation i have used to solve for the tension:
T=m.g.sin(60)=25487N ?
sebastien, notice that the wire system is being acted upon by force T and is also attached to the solid block above T. This means a force of 2T is actually acting upon the cart.
oh yes, thank you i totally missed that.
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