![karlyisaunicorn](/avatars/21144.jpg)
karlyisaunicorn
05.04.2020 •
Physics
On a frictionless surface, a 32 kg student pushes a 43 kg student. If the 32 kg student slides
back at 2.4 m/s, how fast will the 43 kg student be sliding and in what direction?
Solved
Show answers
More tips
- C Computers and Internet What to Do If Your ICQ Gets Hacked?...
- L Leisure and Entertainment How to Land on the Moon: Your Comprehensive Guide...
- T Travel and tourism How to Use a Compass: A Beginner s Guide...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- C Computers and Internet Отправляем смс через интернет: легко и просто...
- L Leisure and Entertainment The Best Film of 2010: A Look Back at the Academy Awards...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
Answers on questions: Physics
- P Physics A thermogram taken outside a house shows high amounts of thermal energy around the windows but not around the roof. Which conclusion supports the thermogram?...
- P Physics The earth s surface absorbs of the sun s energy that reaches it. One quarter all three-quarters half...
- P Physics A man stands in front of a vertical plane mirror which is fixed on a wall as shown in the diagram below. The image formed by the mirror is also shown. The man looks...
- P Physics What type of reaction is shown below? * 2kc1o3(s) — 2kc1(s) + 302(g) o decomposition double replacement single replacement synthesis...
- P Physics 1.which result from the Interaction of solar weather on Earth’s magnetic field? Select the two correct answers. (1) A.geomagnetic storms B.auroras C.radiation belts...
- P Physics What issues arise from immigration based on economic factors?...
- P Physics 1. Emission of charged particles is?...
- H Health Aconvention and visitor s bureau or cvb is an organization that works with meeting planners to provide tourist information services to business and leisure travelers....
- B Biology In plant cells, differentiation begins with the very first cell division after the formation of the zygote; where elongation in the root stops; after the roots and...
- M Mathematics Which of the following is equal to the expression below ? (6^-7 ) ^3 a. (-1/6) ^21 b. (1/6 ) ^21 c. (1/6) ^-21 d. (-1/6 ) ^-21 ?...
Ответ:
Correct V₂ = 1.79 m/s
Explanation:
Given:
m₁ = 32 kg the mass of the first student
V₁ = 2.4 m/s speed of the first student after pushing
m₂ = 43 kg the mass of the second student student
V₂ = ? speed of the second student after pushing
I₁ = m₁ · V₁ impulse of the first student
I₂ = m₂ · V₂ impulse of the second student
Under the law of impulse maintenance, the total impulse of an object must be constant over time.
Since the total impulse before pushing was equal to zero it must be afterwards.
I₁ + I₂ = 0 ⇒ I₂ = - I₁ ⇒ V₂ = - V₁
Given that the impulses are vectors a sign minus ahead of the first pulse mean, they are opposite directions.
m₂ · V₂ = m₁ · V₁ ⇒ V₂ = (m₁ · V₁) / m₂ = (32 · 2.4) / 43 = 1.79 m/s
V₂ = 1.79 m/s
God is with you!!!
Ответ: