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# Moments Question watch

1. Hi,

Calculate the tension in the rope T

So I did:

moment = force X distance
100 X 0.3 = 30

and

150 X 0.6 = 90

So then 30 + 90 = 120Nm

Where did I go wrong ?

Thanks
2. 0.3 x 100 + 0.6 x 150 = 1.2 x T
3. Your anticlockwise moments are correct.

Reconsider the Tension though, if you are taking moments from O (grey blob) and moment = force * distance. What will T equal?

And then, assuming equilibrium, anticlockwise moments = clockwise moments.
4. (Original post by racshot65)
So I did:

moment = force X distance
100 X 0.3 = 30

and

150 X 0.6 = 90

So then 30 + 90 = 120Nm

Where did I go wrong ?

Thanks
You haven't finished the question. You've calculated the moment, but you're looking for the tension - a force. As you've already said, moment = force * distance.
5. Ahh thank you I see

Moment = 120Nm

moment = force X distance

so

Force = moment / distance

T = 120/1.2 = 100N

!

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