How much force can a truck seat back cushion absorb during a collision?

I do not know much about this, please help.
My truck seat back cushion is 2" thick. Truck A is ~5,700 lbs from google. 2011 f-150 super cab 6.5ft bed.
Truck B is ~5775. 2015 GMC Yukon xl slt.
If truck A is stopped and braked and truck B hits truck A going 45-55mph creating a force of 52,695.8758604 N- 64,406.07049606 N or 11,846.503133255 lbf -14,479.059385089lbf.
I am not sure what density the foam is but how much does it take away in force? I hope this makes sense. I will do my best to answer any questions.

I am afraid we cannot answer questions that look like a real-life accident. This has several reasons:

• We do not have all the information.
• We are not certified in any way and our comments would be of no legal value.
• We cannot even verify the data.
• It is impossible to provide a necessary description on the internet.

If you want a reliable comment then please contact a local certified expert who can directly inspect the situation.

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