at what speed would a car need to hit and knock down a metal 7 ft. lampost on a grass surface with a plastic bumber about a foot off the ground, and what damage would be done to the car

Answer 1

I wonder what phsics is.

What difference does it make how high the lampost is?

I remember one of my (ex)students coming to my house once to visit my daughter, the girl driving missed the turn, went across the lawn (it was wet), slid into my front house wall on the porch, and the car went into my library. The front wall of course collapsed, and the top of it fell on the car, smashing what was left of the car. The dad of the girl came promptly, he was drunk (he drove himself there). The girl was an emotional wreck. I wish I had a lampost there...or two of them...
What does this have to do with physics? That in itself is an excellent question. When you need an accident investigator, you hire one. Getting one for free is a waste of money.

Answer 2

Hey Bob,

Your a real smart..., you know that, did you ever here of FORCE & MATTER you dipstick, my 93 year old mother was blamed for this lampost accident with a car that has no mark on either bumper, but an 18 wheeler was backing up after moving people in next to my mother and I KNOW HE BACKRD UP and knocked down the 7 ft. lampost, & even I know a 1ft. off the ground bumper of a car would nedd to be travceling 40 + to knock down that metal lampost, you moron!!!!!

Answer 3

Thanks.