yeah, don't be afraid to be a little frivol, all right? and so we said impulse is a change in the quantity, inertia in motion, moving inertia. we call that what? that oomph, what do we call it? begin with m. momentum. okay, don't be shy. and that's what we talked about, right? and we said for big changes in momentum, you'll have what kind of impulses? begin with b. big. for small changes in momentum, you'll have what kind of impulse. begin with s. small, all right? now, what happens when-- what happens to the change in momentum when bouncing occurs? larger or the same as if bouncing does not occur? begin with a l. larger. and we can show that with this device here. here's a dart. it's like a dart and i have a sharp nail in there. and what i'm gonna do is i'm gonna lift the dart up, and i'm gonna allow it to swing against that wall. it's gonna make a collision. watch this. the block did not tip. i'll try it again. the block did not tip. this time, i'm going to remove the point. and now, i have just rubber here. this time, when i swing it, i

frivolous things that are meaningless. >> and will not probably advance your life. hopefully make you smile. give you a littleve a little bone to pick. >> you more than i, because you spend a lot more time there. you live there. >> in our apartment, have you ever been where there's construction going on in your neighborhood? >> they start putting up the scaffolding and nobody really knows what's going on. >> right. and even in your neighborhood they're redoing the street. you think when is that going to be over? >> work has to be done. >> across the street. that's fine. i wonder when it's over. i wonder when it's over. >> how long is it going to be? >> oh, work on this project is -- 2017. thank you for your patience. >> you know what i realized, hod? >> what? >> that's what in time for my 41st wedding anniversary to my first husband. that's the day. it will be great. >> i cannot believe it's april of -- what year are we in? >> 2013. >> '14, '15, '16, '17. four years, they're going to be digging or whatever they're doing. >> i know. you have a year-to-year lease, though, hoda. you can change things? >> i do? >

frivolous things. >> and will not probably advance your life. probably make you smile, give you a little your neighborhood? >> they start putting up the scaffolding and nobody really knows what's going on. >> you think when is that going to be over? >> work has to be done. >> across the street. that's fine. i wonder when it's over. >> how long is it going to be? >> oh, work on this project is -- 2017. thank you for your patience. >> you know what i realized, hod? >> what? >> that's in time for my 31st wedding anniversary to my first husband. that's the day. it will be great. >> i cannot believe it's april of -- what year are we in? >> 2013. >> '14, '15, '16, '17. four years, they're going to be digging, or whatever they're doing. >> i know. you have a year-to-year lease, hoda. >> i do? >> you can change things. >> do i? >> yes, you do. >> do i? >> yes, you do. >> nobody told me. >> i would like to know why your rent is not affected when all of your -- all of the so-called benefits you get from living on that street are incringed and infringed. >> we're not even showing what it's like. >>

frivolous lawsuits. there's a series of things that we could do that americans could understand that we could implement at very little cost to taxpayers that we know would make the system better. and if we keep working on it we could keep finding little ways to make sure that no one goes without insurance. i would like to think that i could help my insurance, health insurance for my grandchildren who are six and five years old, policies that they could keep throughout their life. there's no reason they have to wait to get a job to get insurance and then when they lose their job and go to a next one they have to get new insurance. we shouldn't have a system that way. but we don't have to replace our system with government health care to fix that. [applause] >> the question from tommy potter. since the debt limit issue is around the corner, would it be a stronger debate to lump it all into one big issue? >> you know, there are two major fiscal chokepoints between now and the end of the year and our country is in bad enough shape that we need to take care of both of them. anybody who says we should wait and what is goin