0
$\begingroup$

This is the problem I am dealing with: "One of the functions of an automotive air bag is that it lengthens the collision time. Without an air bag, suppose the 100Ns impulse of a collision is taken up by a fairly rigid dashboard, requiring a time of 15 ms. Find the amount of force exerted on the passenger."

Up till this problem I have only dealt with problems using the equation F x Change in Time = Mass x Change in Velocity. This problem only gives me 2 of the 4 variables in that equation, so I am at a loss of how to figure it out. Please help!

$\endgroup$
  • $\begingroup$ remember the definition of impulse; this lets you continue. $\endgroup$ – Arnold Neumaier Nov 18 '12 at 17:00
2
$\begingroup$

You're given the impulse and time, so simply susbtitute the given variables in the formula which calculates the impulse...

Which is

impulse = F * change in time

So... substitue the variables given to you and rearrange

100 = F * 15
F = 100 / 15
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.