- #1
jillz
- 15
- 0
Crash test dummies don't always wear seat belts. If a 78 Kg dummy, in a car traveling at 53 Km/h, hits a concrete barrier, what is the force applied to the dummy?
Looks like these are impulse problems: [itex]I \equiv F\Delta t = \Delta (mv)[/itex]jillz said:I don't have any additional info; just the 3 other questions from the page...do they all use the same type of formula?? what other info should I look for?
Insufficient information provided. You're given the impulse but not the time. The same impulse can be given quickly (high acceleration) or slowly (low acceleration).1. What acceleration does Chris give his 0.48 kg Physics book, when he accidentally knocks it off a table with an impulse of 2.3 Ns?
You have all the needed information.2. A force of 3420 N is applied to a 145 g baseball. If the baseball approaches the batter at 41.3 m/s and leaves at 44.2 m/s, how long was the bat in contact with the ball?
Insufficient information provided. Again, no time is given.#3: crash test dummies ?. {If a 78 kg dummy, in a car traveling at 53 Km/h, hits a concrete barrier, what is the magnitude of the force applied to the dummy?}
You have all the needed information.4. How much force is applied to a 76 kg man’s legs when he jumps off a table 1.0 m above the floor, if it takes 0.11 s for him to stop? (HINT: Remember your kinematic equations.)
Crash test dummies are used to simulate human bodies in car crashes and gather data on the effects of impacts. In some cases, researchers want to see the effects of not wearing a seat belt, which is why they do not always put seat belts on the dummies.
Crash test dummies are designed to withstand high levels of impact and are not at risk of injury like humans are. Therefore, it is safe for them to not wear seat belts during controlled crash tests.
Crash test dummies have sensors and other instruments attached to them that measure various factors such as acceleration, force, and movement during a crash. This data is then analyzed to understand the effects of not wearing a seat belt.
Yes, the results from crash tests with and without seat belts are significantly different. Not wearing a seat belt can increase the risk of injury and even death in a car crash, which is why it is crucial to always wear one while driving.
Since crash test dummies are not human and do not have the same rights and laws as humans, it is not illegal for them to not wear seat belts during tests. However, it is important to remember that wearing a seat belt is a legal requirement for humans while driving.