In a car chase scene martin flips over a armored truck by jaming on brakes infront of it using a cop car ....Can this be done ?

a little more information would be helpful.

Not a chance that the armoured car would flip up in the air!

The maths don't allow it..

The armoured car would weigh over 4 tonnes and the direction of travel would be straight ahead at say 60mph...

That A/C would ride OVER the car in front, the thing would just carry on forward, if you have ever seen a big rig hit a car then you will know that the car ALWAYS comes off worse! and usually ends up squashed under the front of the truck

To get the back of the A/C to lift you would have to change the direction of travel of over 4 tonnes of material within a few seconds, and that car in front simply could not help achieve this... (even if it got destroyed and flattened to the road, it does not have enough mass!)

so no... it can't be done.. look at the EUROncap crash tests to see what happens in a head on crash...

this is one of the biggest cars I could find with video...

http://www.euroncap.com/Player.aspx?nk=23b0e220-adaa-4c...86-A9F4-078B4A7D2706

now triple the weight..