Originally Posted By: paul
100kg mass bashing into it at 40m/s.
thats 4000N isnt it?
at least it is if the mechanism stops
the 100kg mass in 1 second.

Yep, on average it is. It doesn't apply a constant 4000N.

Quote:

whats the name of the program you used?

LISA www.lisa-fet.com

Quote:

the reason I say 1000N longitudinal
is because you say 3000N lateral.
you cant have a reaction larger that the action.

The 'action' on the left spring is -1500N, the reaction applied by the spring is equal and opposite, +1500N. Similarly for the other spring.

Again, there's no reason to conserve magnitudes of forces. You can easily apply 4000N longitudinally and get 10,000N sideways. It's just mechanical advantage.

Quote:

for every action there is a equal and opposite reaction.

Yes, opposite, not sideways.