# Why does the rear suspension sink when the emergency brake is applied?

**URL:** <https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002>\
**Category:** General Discussion\
**Created:** [September 15, 2020, 8:41pm UTC](https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002 "2020-09-15T20:41:43Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [September 16, 2020, 1:59pm UTC](https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002/21 "2020-09-16T13:59:13Z")

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> [@circuitsmith](#):
>
> Staying awake in statics class

Oohh yeah. And Dynamics to follow. And then a class I think was called Theory of Machines and the final pain… Continuum Mechanics… tensors are NOT your friends!

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**Author:** ![zaverxexperiments\_166654](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/zaverxexperiments_166654/32/20517_2.png) [@zaverxexperiments\_166654](https://community.cartalk.com/u/zaverxexperiments_166654)\
**Post date:** [September 16, 2020, 2:02pm UTC](https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002/22 "2020-09-16T14:02:05Z")

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So if I understand this correctly, the dip is caused by brake torque. So when there is resistance, i.e. the throttle being applied or the car being dragged along, the brake torque resists the movement, which results in the suspension dipping because of anti lift. From the looks of things, anti lift is also applied in independent suspensions also?

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [September 16, 2020, 2:15pm UTC](https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002/23 "2020-09-16T14:15:46Z")

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> [@zaverxexperiments\_166654](#):
>
> anti lift is also applied in independent suspensions also?

Yes it is…

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**Author:** ![chunkyazian](https://avatars.discourse-cdn.com/v4/letter/c/7993a0/32.png) [@chunkyazian](https://community.cartalk.com/u/chunkyazian)\
**Post date:** [September 16, 2020, 3:01pm UTC](https://community.cartalk.com/t/why-does-the-rear-suspension-sink-when-the-emergency-brake-is-applied/170002/24 "2020-09-16T15:01:57Z")

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You know you secretly love tensors 😉 I didn’t think tensor was so difficult until I had to code them using Fortran in my finite element class. I think using such an antiquated language really hindered learning FEM itself.

@circuitsmith be careful with dynamics. It starts off gently then you wouldn’t know what hit you.

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