herchellann302
05.08.2019 •
Physics
Erica (38 kg ) and danny (43 kg ) are bouncing on a trampoline. just as erica reaches the high point of her bounce, danny is moving upward past her at 4.7 m/s . at that instant he grabs hold of her.part awhat is their speed just after he grabs her?
Solved
Show answers
More tips
- G Goods and services What Useful Foods Can You Buy at Supermarkets?...
- G Goods and services How to Choose the Best Publishing House for Your Children s Book: Tips and Recommendations...
- S Science and Technology When do we change our clocks?...
- A Animals and plants How to Teach Your Parrot to Talk?...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- F Food and Cooking How to Make Polendwitsa at Home?...
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- P Philosophy Unbelievable stories of encounters with otherworldly forces...
- L Leisure and Entertainment How to Choose the Perfect Gift for Men on February 23rd?...
- H Health and Medicine How to Treat Whooping Cough in Children?...
Answers on questions: Physics
- P Physics Why is the law of gravity an example of a universal law? a) gravity is the attraction of any mass to any other other mass . b) gravity is a force that affects everyone on earth...
- P Physics What is the least functional sense at birth?...
- P Physics When you stand quietly, you pivot back and forth a very small amount about your ankles. It s easier to maintain stability if you tip slightly forward, so that your center of...
- M Mathematics What is 7,790 divided by 210 and the remainder? (cause i really need with long division cause i...
- M Mathematics What is this this is a unit ! 6(x+7) for x=9...
- H Health When microblal action during decomposition in aquatic ecosystems removes too much oxygen, the body of water experiences...
- M Mathematics It is again time for the warren schools annual harvest dinner....
- M Mathematics Kristen wants to cut ladder rungs from 6ft board how many rungs can she cut if they are 3/4 ft...
- M Mathematics The length of a standard jewel case is 3 cm more than it’s worth. the area of the rectangular top of the case is 238 cm² find the length and width of the jewel case....
- P Physics The erg is a unit of work in units of centimeters (cm), grams (g), and seconds (s), and 1 erg=1 g⋅cm2/s2 . recall that the si unit of force is the newton (n) and is equal to...
Ответ:
In the situation described, Erica and Danny undergo a non-elastic collision which will conserve their combined momentum. Since Erica is stationary, her momentum is 0. And since Danny is moving upward at 4.7 m/s his momentum is 43 kg * 4.7 m/s = 202.1 kg*m/s. Assuming that both Erica and Danny will be moving as a joined system, their combined mass is 38 kg + 43 kg = 81 kg. Since the momentum will be the same, their velocity will be 202.1 kg*m/s / 81 kg = 2.495061728 m/s. Since we only have 2 significant figures in the provided data, rounding the result to 2 significant figures gives a velocity of 2.5 m/s going upward.
Ответ: