All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars
 perplexus dot info

 Deceleration (Posted on 2003-10-02)
George is driving 100 ft/sec toward an intersection.
He looks to his right, and sees Bill, driving 30 ft/sec toward the same intersection. George foolishly slams on his brakes.

If he had kept going 100 ft/sec, he would have been through the intersection long before Bill got there.

At the instant that he slams on his brakes, the center of George's car is 125 ft from the intersection, and the center of Bill's car is 150 ft from the intersection. George's brakes give his car an acceleration of -30 ft/sec².
Bill never changes his speed.
Each car is 13 ft long and 7 ft wide.

Will there be a collision?

 See The Solution Submitted by DJ Rating: 4.2308 (13 votes)

 Subject Author Date Shorter solution Robin Routledge 2003-10-09 17:12:05 re: fiziks...here goes fwaff 2003-10-03 04:22:47 fiziks...here goes Vito 2003-10-02 20:32:53 Just to be complete... nikki 2003-10-02 16:15:00 oops, made myself look dumber than I really am FatBoy 2003-10-02 14:26:06 re: Hey guys!! Charlie 2003-10-02 14:25:02 re(2): Hey guys!! FatBoy 2003-10-02 14:12:45 re: Hey guys!! SilverKnight 2003-10-02 13:56:27 Hey guys!! FatBoy 2003-10-02 13:12:35 re: Solution SilverKnight 2003-10-02 13:00:45 re: Solution fwaff 2003-10-02 12:59:23 Solution David 2003-10-02 11:27:37 re: okay, here goes Charlie 2003-10-02 09:43:34 re: solution FatBoy 2003-10-02 09:27:31 okay, here goes FatBoy 2003-10-02 09:25:22 solution Charlie 2003-10-02 09:23:29

 Search: Search body:
Forums (0)