Extracurricular activities questions.

I was curious if it would be bad if I lied about the length i did a club or sport. I did football for my 10th and 11th and track and field for my 10th and a little bit of 11th. I stop because of injury. Can I say I did it for my 9th grade year too. We have a new coach so they couldn’t even ask if I played cause he doesn’t know me.
Also if I want to join the robotics club next year. Can I say I joined all 4 years?
Last thing is do colleges look at jobs as ECs?

No, do not lie on your application. It will not benefit you and will only harm you. This is a very serious matter. For example, sports rosters may be available online and lying can and will result in your application being rescinded.

Jobs count as ECs.

To Guinea girl do colleges even ask how long you was involved in a club and should I put that I stopped because of injury. I actually was a college prospect for football

yes, they ask what years you participate. You can include that you stopped due to injury.