Calculating Torque for Lever with Weight

[choudhari.mayu]

Homework Statement

Please find attached image. Help me pleasez find the torque.

Let me know if need any more info. the lever with weight rotates about the hinge. Need torque about the hinge.

1)
Image with 50 kg weight:
the 50 kg weight with link rotates about the red hinge point.

angle is as shown.

please help me out its urgent. need to calculate the torque about the red hinge point.

Assume Distances: black:x red: y conc. Mass size : z x z

2)
Image with 66 kg weight:
Also if we imagine the second position of the lever, it rotating 90 degree about the hinge, the link in black will have zero moment right??

then what will be the remaining torque.

Homework Equations

torque= distance * force or load

The Attempt at a Solution

i calculated the torque as
:
1) here i did ((30+2+50)*9.81*Sin20degree) * (horizontal distance between red hinge and centre of Blue square mass: 260 mm)

Am i doing it right.?

2)
(4.5*200*9.81) + (66*160*9.81)

Am i doing it right

 

[rude man]

In (1), length of bar is needed.
sin(20) does not belong anywhere in your formula.

In (2), the units of length are not standard units. Use SI units.
What should be the lever length for the bar? Not 200 mm = 0.2m!
You also left out the weight of the veetical bar holding the 66 kg weight.