Balls (and other thrown objects) in a moving carFor those of you with an appetite for the scientific and technical, whether it be lofty theory or more practical discussion. | |
 |
| | LinkBack | Thread Tools | Display Modes |
| | |
| |||||||
Balls (and other thrown objects) in a moving carFor those of you with an appetite for the scientific and technical, whether it be lofty theory or more practical discussion. | |
|
| | LinkBack | Thread Tools | Display Modes |
17-08-2007
| #1 | ||
| can't spell :D  Join Date: 26-10-2004 Location: Colchester, Essex
Posts: 2243
Thanks: 187
Thanked 37 Times in 34 Posts
My System: Sky+ Pace v3, and before that analouge 80cm dish with Prima by Pace box pointed at 19.2e (not very imaginative then!) |
What I've always wanted to know is - when in a moving car (or bus etc), if you throw a ball up and down, why is it that the ball goes up and down as if one were standing still, when surely you would expect the ball to go right to the back of the car the moment you throw it? I suppose you could also ask additionally why it is that flies (and other flying insects) can fly in a car and bus without also going straight to the back? | ||
| | |||
|  |
|
17-08-2007
| #2 | ||
| Super Moderator  Real name: Mark Join Date: 17-05-2007 Location: Kent,UK
Posts: 4496
Thanks: 76
Thanked 635 Times in 602 Posts
My System: TM6800HD, TM1000, TM600 Linux,TM5200, TM2200 motor, Triax TD110 dish + Fortec 85cm. Meter=Satlook Micro+G2 NIT | With the ball, it is because when you throw it up and down it also travels in the same direction and speed as the vehicle, this is because you were travelling at that velocity when you let go of it. It is the conservation of momentum. When you held the ball it had momentum (mass x velocity), when you let go of it the momentum has to be conserved, so it will continue to travel at the same velocity (since its mass has not changed). When you chuck it up you are superimposing a vertical movement onto it also. With the fly it must be due to the air trapped within the vehicle. Smash your front and rear windows of your car to get rid of it.  | ||
| Last edited by Robbo; 17-08-2007 at 02:24 PM. | |||
|
| |
| The Following User Says Thank You to Robbo For This Useful Post: | Salty25 (10-04-2008) |
|
17-08-2007
| #3 | ||
| Prince of Birthdays  Join Date: 28-09-2005 Location: Sweden
Posts: 3554
Thanks: 16
Thanked 118 Times in 105 Posts
My System: Dream7020 and AZ Elite | Now, if U put the pedal to the metal and do the ball stunt then the Ball would go backwards as long as U accelerate Like shooting a gun in a moving plane If U donīt acc then the bullet doesnīt know that it is flying in a plane  | ||
|
| |
|
18-08-2007
| #4 | ||
| can't spell :D Join Date: 26-10-2004 Location: Colchester, Essex
Posts: 2243
Thanks: 187
Thanked 37 Times in 34 Posts
My System: Sky+ Pace v3, and before that analouge 80cm dish with Prima by Pace box pointed at 19.2e (not very imaginative then!) | Thanks, I thought it had something to do with velocity, but I never bothered to ask anyone up to now (I've wondered this since my teens but never got around to asking why!). Rob - I like your suggestion of how to get rid of a fly! | ||
| | |||
|
| |
|
18-08-2007
| #5 | ||
| Super Moderator Real name: Mark Join Date: 17-05-2007 Location: Kent,UK
Posts: 4496
Thanks: 76
Thanked 635 Times in 602 Posts
My System: TM6800HD, TM1000, TM600 Linux,TM5200, TM2200 motor, Triax TD110 dish + Fortec 85cm. Meter=Satlook Micro+G2 NIT |
We did momentum in O levels maths, (26 yrs ago for me). I knew it was conservation of momentum, but must admit I did have to have a quick google to remind myself what it was. | ||
|
| |
|
| Bookmarks |
| Tags |
| balls, car, moving, objects, thrown |
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
| |
Linear Mode
