Original post by Elmi
In the lever system shown, W1 = 33 N, W2 = 79 N and W3 = 30 N. If the system is in equilibrium, calculate the vertical reaction at the support (in N), stating your answer in the correct sign convention.
What influence do the pulleys have on the lever?
What influence do the pulleys have on the lever?
the pulleys enable the strings to pull vertically up with tensions = suspended weights
Original post by the bear
the pulleys enable the strings to pull vertically up with tensions = suspended weights
So do you calculate the tension in the string
Original post by Elmi
So do you calculate the tension in the string
yes, once you have found the tensions they are equal to the two weights suspended from the pulleys
Original post by the bear
yes, once you have found the tensions they are equal to the two weights suspended from the pulleys
Can you guide me through it, i know that verticle forces equals zero,
so -w2n-w4n+pulleys+r=0
I'd start by taking moments about the fulcrum to find out what W4 is, and then proceed as previously covered.
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