How Does an Air Bag Cause Deceleration During a Crash?

AI Thread Summary
An airbag inflates during a crash to decelerate a dummy, which has a mass of 75 kg. The net force acting on the dummy is 825 N directed toward the rear of the car. To find the dummy's deceleration, the formula F = ma can be applied, where F is the net force and m is the mass. The discussion emphasizes the importance of understanding the relationship between force, mass, and acceleration in this context. Proper application of the equations will yield the required deceleration value.
hslove24
Messages
1
Reaction score
0

Homework Statement



During a test crash, an air bag inflates to stop a dummy's forward motion. The dummy's mass is 75 kg. If the net force on the dummy is 825 N toward the rear of the car, what is the dummy's deceleration?


Homework Equations



w=mg

The Attempt at a Solution



someone help!
 
Physics news on Phys.org
that has nothing to do with gravity. F = ma and your given two of them
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanged mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top