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MTH404 ASSIGNMENT NO. 1 FALL 2022 |
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MTH404 ASSIGNMENT NO. 1 FALL 2022 || 100% RIGHT SOLUTION || DYNAMICS || BY VuTech
Assignment #
01 MTH404 (Fall 2022)
Maximum Marks: 10 Due Date: November 20, 2022
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Question No. 1
Find the tangential and normal components of the acceleration of a point
describing the curve y2 – 2x = 1 -2y with the uniform speed v
when the particle is at (0, -1 ± `\sqrt 2 \)`.
Solution:
The particle moving along a curve
Tangential component = `\a_{T}` = `\frac{dv}{dt}`=
0
And
Normal component = `\a_{N}` = `\frac{v^2}{\rho }`
We know that roh equation
`\rho
= \left[ \frac{1 + \left( \frac{dy}{dx} \right)^2}\frac{d^2y}{dx^2}
\right]^{\frac{3}{2}} - - - - - - -
- - \left( A \right)`
Given curve
Y2 – 2x = 1 – 2y
Taking derivative w.r.t x
2y`\frac{dy}{dx}` - 2 = - 2`\frac{dy}{dx}`
2y`\frac{dy}{dx}` + 2`\frac{dy}{dx}` = 2
2`\frac{dy}{dx}\left(
y + 1 \right)` = 2
`\frac{dy}{dx}\left( y + 1 \right)` =
1
`\frac{dy}{dx}= \frac{1}{y + 1} - \ - \ - \ - \ - \ - \left(
1 \right)`
At point ( 0 , - 1 ± `\sqrt 2 \)`
`\frac{dy}{dx}= \frac{1}{- 1 \pm \sqrt 2 + 1}`
`\frac{dy}{dx}= \frac{1}{\pm \sqrt 2 }`
From equation (1)
`\frac{dy}{dx}` = `\{y + 1}^{ - 1}`
Taking derivative w.r.t x
`\frac{d^2y}{dx^2}`= `-\(y +
1)\^-2\frac{1}{\left(y + 1 )\}`
`\frac{d^2y}{dx^2}`= `\frac{-1}{(y
+ 1)\^-2}.\frac{1}{\left(y + 1 )\}`
`\frac{d^2y}{dx^2}`= `\frac{-1}{(y
+ 1)\^3}`
At point (0, -1 ± `\sqrt 2 \)`
`\frac{d^2y}{dx^2}`= `\frac{-1}{(-
1\ \pm \sqrt 2 + 1)\^3}`
`\frac{d^2y}{dx^2}`= `\frac{-1}{(\
\pm \sqrt 2 )\^3}`
Now equation (A) becomes
`\rho
= \left[ \frac{1 + \left(\frac{1}{\pm \sqrt 2})^2}\frac{-1}{(\ \pm \sqrt
2 )\^3}]^{\frac{3}{2}} `
`\rho
= \left[ \frac{1 + \left( \frac{1}{ \pm \left( 2 \right)^{\frac{1}{2}}}
\right)^2}\frac{ - 1}{\left( \pm \\sqrt 2 \right)^3}
\right]^{\frac{3}{2}} `
`\rho
= \left[ \frac{1 + \frac{1}{2}}{\frac{ - 1}{\left( \pm \\sqrt 2 \right)}^3}
\right]^{\frac{3}{2}} `
`\rho
= \left[ \frac{\frac{3}{2}}{\frac{ - 1}{\left( \pm \sqrt 2
\right)^3}} \right]^{\frac{3}{2}} `
`\rho
= \left[ 3\left( \pm \\sqrt 2 \right) \right]^\frac{3}{2} `
`\rho
= \left[ \pm \3\sqrt 2 \right]^\frac{3}{2} `
Normal
component = `\a_{N}` = `\frac{v^2}{\left[ \pm
\3\sqrt 2 \right]^{\frac{3}{2}}`
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