# Physics

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#1
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#2
This is the question please can someone help me
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2 months ago
#3
What have you tried?

Have you studied moments?
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#4
(Original post by Callicious)
What have you tried?

Have you studied moments?
No I'm completely stumped I just tried to assume why but I am still not sure How I could I tried to do 3+2=5 on the left then 2+5N on right
0
2 months ago
#5
(Original post by zainshahbaz)
No I'm completely stumped I just tried to assume why but I am still not sure How I could I tried to do 3+2=5 on the left then 2+5N on right
Sum of moments clockwise = Sum anticlockwise
Get an equation that satisfies that
Then solve for M.
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#6
(Original post by Callicious)
Sum of moments clockwise = Sum anticlockwise
Get an equation that satisfies that
Then solve for M.
Sorry i am still super confused could you at least help me with the formula so I know where to start?
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#7
Sorry is it M=FxD?
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#8
(Original post by zainshahbaz)
Sorry is it M=FxD?
I tried to do L.S=R.S

(3N)(3M)=9 (L.S) therefore R.S= (5N)(1M) (1M)(4N)
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2 months ago
#9
(Original post by zainshahbaz)
I tried to do L.S=R.S

(3N)(3M)=9 (L.S) therefore R.S= (5N)(1M) (1M)(4N)
Careful. Moment = Force * distance.
Get the force for the mass M.
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#10
Sorry what do you mean by that I thought this was force*distance Im still confused please help me
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2 months ago
#11
(Original post by zainshahbaz)
Sorry what do you mean by that I thought this was force*distance Im still confused please help me
Go and relearn the stuff you got taught about moments... That's the only advice I can give
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2 months ago
#12
(Original post by zainshahbaz)
Sorry what do you mean by that I thought this was force*distance Im still confused please help me
The moment is the force that works on a distance or a length, so moment = force (N) * distance (m). Your job is to balance the bar, that is to say there has to be the same moments on both sides of the bar (the balance point divides the bar in a left and right side). Another informations are in the spoilers, try it by yourself first!

Spoiler:
Show

To balance the bar, the right side from the balance point needs the same amount of moments as the left one. The left side has 3 m * 5 N = 15 Nm, the right one 5 N * 1 m + 1 m * x N = 5 Nm + x Nm. How many Nm are missing on the right side (the x value) to get 15 Nm too?
Last edited by Kallisto; 2 months ago
1
2 months ago
#13
(Original post by zainshahbaz)
Sorry what do you mean by that I thought this was force*distance Im still confused please help me
I agree with Callicious that you need to learn the fundamental of the moment of force or see how others apply the moment of forces to similar problems.

Below are some videos that you can consider.
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#14
(Original post by Kallisto)
The moment is the force that works on a distance or a length, so moment = force (N) * distance (m). Your job is to balance the bar, that is to say there has to be the same moments on both sides of the bar (the balance point divides the bar in a left and right side). Another informations are in the spoilers, try it by yourself first!

Spoiler:
Show

To balance the bar, the right side from the balance point needs the same amount of moments as the left one. The left side has 3 m * 5 N = 15 Nm, the right one 5 N * 1 m + 1 m * x N = 5 Nm + x Nm. How many Nm are missing on the right side (the x value) to get 15 Nm too?
10?
0
#15
(Original post by Kallisto)
The moment is the force that works on a distance or a length, so moment = force (N) * distance (m). Your job is to balance the bar, that is to say there has to be the same moments on both sides of the bar (the balance point divides the bar in a left and right side). Another informations are in the spoilers, try it by yourself first!

Spoiler:
Show

To balance the bar, the right side from the balance point needs the same amount of moments as the left one. The left side has 3 m * 5 N = 15 Nm, the right one 5 N * 1 m + 1 m * x N = 5 Nm + x Nm. How many Nm are missing on the right side (the x value) to get 15 Nm too?
so it would be (5)(2)?
0
2 months ago
#16
(Original post by zainshahbaz)
so it would be (5)(2)?
(Original post by zainshahbaz)
10?
Looks like that you finally got it. Would be nice to see what your point is with (5)(2) in brackets. Guess one is the force N and the other one distance m.
1
2 months ago
#17
Has the image changed?
The anticlockwise moments (left hand side) are generated from 3N at 3m and 2N at 0.5m
The clockwise moments are generated from 5N at 1m and force M at 2m

(Original post by Kallisto)
The moment is the force that works on a distance or a length, so moment = force (N) * distance (m). Your job is to balance the bar, that is to say there has to be the same moments on both sides of the bar (the balance point divides the bar in a left and right side). Another informations are in the spoilers, try it by yourself first!

Spoiler:
Show

To balance the bar, the right side from the balance point needs the same amount of moments as the left one. The left side has 3 m * 5 N = 15 Nm, the right one 5 N * 1 m + 1 m * x N = 5 Nm + x Nm. How many Nm are missing on the right side (the x value) to get 15 Nm too?
Last edited by mqb2766; 2 months ago
0
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