Question

The net torque about pivot A provided by the forces
shown in the figure, for L = 4 m is
90 N
60 N
70 N
60°
90 _30°
000
>50 N
150 N
1/-
A
AU2
(1) 90 Nm
(2) 180 Nm
(3) 270 Nm
(4) 750 Nm​

Answer 1

The value of net torque about pivot is 90 N-m

Explanation:

Positive torque = 60 cos 60°  = 30 N x L/2

                          =  30  4 /2 = 60 N

And 50 N sin 90°  = 50 N

   70 sin 30°  = 35 x L /4 = 70 N

Total positive torque = 50 + 60 + 70 = 180 N

Similarly negative torque =  50 N and 40 N

So net  torque is 180 N - 50 N - 40 N = 90 N-m

Thus the value of net torque about pivot is 90 N-m

Also learn more

What are the factors on which torque dependss?

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Answer 2

Answer:

90 N

Explanation:

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