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| Thread ID: 108982 | 2010-04-19 07:25:00 | Quick question, Physics? | Metla (12) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 878119 | 2010-04-20 12:02:00 | That said, It wasn't a trick question, Just a poorly presented one. | Metla (12) | ||
| 878120 | 2010-04-20 12:21:00 | Option B 109350 Joules 109.35 KiloJoules www.csgnetwork.com |
Whenu (9358) | ||
| 878121 | 2010-04-20 20:31:00 | Well, ~ I guess it's weight would be still be 300 Kg It's mass would still be 300kg, but it's weight would increase with the acceleration (if it was stationary, it's weight is 3000N - weight and mass are NOT the same thing). |
pcuser42 (130) | ||
| 878122 | 2010-04-20 23:06:00 | Weight is the same as momentum? We are progressing in this millenium ;) (I am presuming that nobody left the earth while the accident was under way, and gravitational anomalies were minimal.) |
R2x1 (4628) | ||
| 878123 | 2010-04-21 06:12:00 | In outer space you have Mass but no weight. | zqwerty (97) | ||
| 878124 | 2010-04-21 06:17:00 | True. But how many motor cycles collide with police cars there? | Sweep (90) | ||
| 878125 | 2010-04-21 06:42:00 | I had a think about the original question, and I think Metla is after momentum, not weight force/impulse. The formula for momentum is mass times velocity. Momentum is conserved during a collision, hence if a moving motorbike hits a stationary car, if the motorbike stops (possible, but unlikely due to more physics laws :groan:), the car will be shunted back (but not as fast). Let's take the original values for the motorbike: Velocity = 100km/h = 27.78m/s Mass = 300kg Momentum before the collision is 8334kgm/s, hence it must remain 8334kgm/s. Assuming the motorbike stops, the car (say 2000kg) will be shunted back at a velocity of x = 8334 / 2000 = 4.2m/s. I know you didn't want to know how fast, but it's just to prove it will move back. :D |
pcuser42 (130) | ||
| 878126 | 2010-04-21 07:30:00 | In outer space you have Mass but no weight. Unless you're not Catholic - then you have no Mass and no weight to get into heaven... :devil |
johcar (6283) | ||
| 878127 | 2010-04-21 07:55:00 | Unless you're not Catholic - then you have no Mass and no weight to get into heaven... :devil :lol: |
WalOne (4202) | ||
| 878128 | 2010-04-21 08:42:00 | Hi Guys Enough maths here to make your head spin but one simple truth has been overlooked. Speed has never killed anyone, suddenly becoming stationary... That's what gets you. Game Junkies Quote. :devil :eek: BURNZEE |
Burnzee (6950) | ||
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