Not much. Studeis show that a 5 year old could break such a foam board in one shot taken in .48 seconds.
it takes about 9 pounds of force to break your arm
a bit of force, not allot of force.
it takes an extremely large amount of force to break through a regular crowbar. but it should take about 500 pounds of force which is quite a lot.
This depends on the bone; to break a finger generally doesn't take much force, but your femur or your thigh bone is harder than cement!
550 lbs. of pressure
force in horse power for rocket at the time of launching
u=0 , a=9.81 , s=0.78 V=u+at; s=ut+1/2at^2; t=0.4s , v=3.9m/s when the mass makes contact with the board. k.e.=1/2mv^2 ~ 15J Im not sure about the force but you would need to assume the time the energy was applied to the board maybe??
2 secs
To break the maxilla you would have to have at least 15 pounds dropped at about 5 feet. The weight and force put together would easily break the maxilla
I've broken my fibula before, and it didn't take much. i was playing soccer and collided with another player. Her shin bone hit the side of my leg (fibula) with considerable force. I never would have thought getting hit like that could break a bone, but it did.
3 sandwiches