# M1 EdexcelWatch

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#1
What does this sentence mean?
'The particle is held in equilibrium by a horizontal force of magnitude Q newtons. The line of the action of this force is in the same vertical plane as a line of greatest slope of the inclined plane.'
Does this mean the force is perpendicular to the slope or it's a horizontal plane and parallel to the ground?
0
2 years ago
#2
What does this sentence mean?
'The particle is held in equilibrium by a horizontal force of magnitude Q newtons. The line of the action of this force is in the same vertical plane as a line of greatest slope of the inclined plane.'
Does this mean the force is perpendicular to the slope or it's a horizontal plane and parallel to the ground?
Here's what a slope in 3D might look like:

You can travel up the orange slope in an infinite amount of ways. One of those ways is shown as the green line. The line of greatest slope means the line that has the biggest gradient so that is shown as the red line on the slope (or any line parallel to this). You can imagine that it's harder to walk up the red line compared to the green line because it has a bigger gradient i.e. it is the line of greatest slope.

Then a vertical plane containing this red line on the slope is shown as the whole red line (including the dashed parts).

If you draw this vertical plane by itself then you get a 2D picture shown below, like what you're used to in M1:

You are told that the Q force is in this plane and is horizontal so it is shown as a horizontal force above.

In short, when you see these long confusing explanations in M1 then it often just means that you have simple 2D diagram like you're used to in M1.
0
#3
Oh right, thanks I get it now!
(Original post by notnek)
Here's what a slope in 3D might look like:

You can travel up the orange slope in an infinite amount of ways. One of those ways is shown as the green line. The line of greatest slope means the line that has the biggest gradient so that is shown as the red line on the slope (or any line parallel to this). You can imagine that it's harder to walk up the red line compared to the green line because it has a bigger gradient i.e. it is the line of greatest slope.

Then a vertical plane containing this red line on the slope is shown as the whole red line (including the dashed parts).

If you draw this vertical plane by itself then you get a 2D picture shown below, like what you're used to in M1:

You are told that the Q force is in this plane and is horizontal so it is shown as a horizontal force above.

In short, when you see these long confusing explanations in M1 then it often just means that you have simple 2D diagram like you're used to in M1.
0
5 months ago
#4
(Original post by Notnek)
Here's what a slope in 3D might look like:

You can travel up the orange slope in an infinite amount of ways. One of those ways is shown as the green line. The line of greatest slope means the line that has the biggest gradient so that is shown as the red line on the slope (or any line parallel to this). You can imagine that it's harder to walk up the red line compared to the green line because it has a bigger gradient i.e. it is the line of greatest slope.

Then a vertical plane containing this red line on the slope is shown as the whole red line (including the dashed parts).

If you draw this vertical plane by itself then you get a 2D picture shown below, like what you're used to in M1:

You are told that the Q force is in this plane and is horizontal so it is shown as a horizontal force above.

In short, when you see these long confusing explanations in M1 then it often just means that you have simple 2D diagram like you're used to in M1.
Well explained. But what does "The line of the action of this force is in the same vertical plane as a line of greatest slope of the inclined plane"? Please explain I really need to know this.
0
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