4 times
Double the speed yeilds double the impact force.
24
Force of impact.
speed, weight and distance.
Speed A + Speed B = Speed Combined Unless they hit each other. Then, under Newton's Third Law, it's (Speed A + Speed B) / 2 = Combined Collision Force IE, if two cars hit each other head-on, both going 50mph, it's the same force as a single car hitting a wall at 50mph. (i.e. The impact force does not double; because you have to divide the absorption force of a second vehicle, which cancels out half of the force)
9 times
true
True
Yes, an airbag will deploy at any speed. HOWEVER, it will not deploy upon just any impact, there are sensors on the vehicle that determine the force of impact, just how hard and blunt the impact was, if it is a small minimal force, then there will be no deployment, but if there was a hard impact/force, then obviously it would deploy.
When speed is doubled, the centrifugal (or centripetal) force increases by a factor of 4. One formula you can use (for centripetal acceleration) is: a = v2 / r. Force, of course, is proportional to acceleration.
speed and velocity
Yes, weight, or more precisely mass*, does have an impact on force. The impact is something like this: an object moving at a constant speed will have more force than an object traveling at the same speed with less mass.So, more mass equals proportionately more force.*Mass is a direct measurement of the amount of stuff in an object. Weight is the measurement of the apparent force of gravity on an object.