Communication problems No forces at some place in universe?

In summary, Homework Statement 1a states that it is impossible for a body to exist in the universe without any force acting on it. b states that it is possible for a centripetal force to do work on an object. c states that roller coasters always start by going up hill because it keeps the ride on the tracks. d states that a slow moving truck could have more kinetic energy than a fast moving car. e states that you push a book across a horizontal desk at a constant velocity, supplying energy into what form (s) does the energy go?. Finally, f states that the attempt at a solution is to break the equations down to their integral parts.
  • #1
1
0

Homework Statement



1a. is the statement "there is no place in the universe where a body can exist with no force acting on it" if aggree or dissagree explain why?...
b. Is it possible for a centripetal force to do work on an object? explain your answer?
c. why do roller coasters rides always start by going up hill?
d. could a slow moving truck have more kinetic energy than a a fast moving car?
e. you push a book acrooss a horizontal desk at a constant velocity, you are supplying some energy to the book into what form (s) does the energy go?

Homework Equations



there are no really equations that i am aware to this. I am a noob!>. help!

The Attempt at a Solution


well my answer for the first one i think its true.. i mean anywhere in the universe every object has its own gravitational force acting upon it.. satelites for example keep themselves floating in orbit because of the mooons and Earth gravity. hmm any expansion on my comment would be appreciated b c and d i have no clue. I think e. the energy goes into mechanical energy?... THANKS IN ADVANCE
 
Last edited:
Physics news on Phys.org
  • #2
matador said:
b. Is it possible for a centripetal force to do work on an object? explain your answer?

In what direction does the centripetal force act? And at any point in time,how do you find the direction of motion of a particle moving in a circle? And finally,the definition of work

matador said:
c. why do roller coasters rides always start by going up hill?
For this, I would guess it has something to do with keeping the roller coaster on the tracks while it goes down hill and then back up. and also maybe to gain gravitational p.e. so it can be converted into another form which gives roller coasters something desirable.

matador said:
d. could a slow moving truck have more kinetic energy than a a fast moving car?
How does one find the kinetic energy of a body?[/QUOTE]

matador said:
e. you push a book across a horizontal desk at a constant velocity, you are supplying some energy to the book into what form (s) does the energy go?
Firstly,what is the book actually doing? Is it staying still or moving? Secondly, is there any other forces that should be considered other than force you exert on the book?
 
  • #3
matador said:

1a. is the statement "there is no place in the universe where a body can exist with no force acting on it" if aggree or dissagree explain why?...

b. Is it possible for a centripetal force to do work on an object? explain your answer?

c. why do roller coasters rides always start by going up hill?

d. could a slow moving truck have more kinetic energy than a a fast moving car?

e. you push a book acrooss a horizontal desk at a constant velocity, you are supplying some energy to the book into what form (s) does the energy go?


Just to elaborate on rock's statements:

A. Hhhmmmmm... a force is defined as accelerating mass, F of G produces a constant acceleration for any mass existing in space time, so I think that practically your assumption is correct. But inside the event horizon of a black hole... who knows...

B. As rock.freak667 said, just look at your definitions of Fcen and Work. Oh and try breaking the equations down to there integral parts i.e.. for Fc:

Fc = m * r [( change in arc length / r )/ time interval]^2

or...

Fc = {m [r ( angular displacement / time )]^2} / r

and for W...

W = (m * a) * displacement (cos theta)

C. Look at how roller coasters meet the Conservation of Energy

D. Simply examine the equation for KE and play around with some values:

KE = .5 * m * v^2

E.
You know that Energy is conserved and you know that there are no perfect closed systems, so draw some force diagrams and try and list all the possible forces acting on the book that may use your KE besides motion...
 

1. What are communication problems with no forces at some place in the universe?

In the universe, there are some areas where no forces exist. This means that there is no matter or energy present, making it impossible for communication to occur. This can pose a challenge for scientists trying to understand and communicate with these areas of the universe.

2. How do scientists communicate with areas in the universe with no forces?

Scientists use various forms of technology to communicate with areas of the universe with no forces. This can include radio signals, infrared light, and other forms of electromagnetic radiation. These signals can travel through the vacuum of space and reach these areas.

3. What are some potential causes of communication problems with no forces in the universe?

One potential cause of communication problems in areas of the universe with no forces is the presence of black holes. These massive objects have a gravitational pull so strong that even light cannot escape, making communication impossible. Other causes could include the absence of matter or the presence of extreme conditions such as high levels of radiation.

4. Can communication be established with areas of the universe with no forces?

While it may be difficult, it is possible for communication to be established with areas of the universe with no forces. As technology and our understanding of the universe continues to advance, scientists are finding new ways to communicate with these areas. However, it may never be possible to establish direct communication in some cases.

5. How do communication problems with no forces in the universe impact scientific research?

The communication problems in areas of the universe with no forces can greatly impact scientific research. These areas may hold valuable information and data that could help us better understand the universe, but the lack of communication makes it difficult to gather this information. Scientists must find alternative methods and technologies to study these areas and overcome the communication challenges they pose.

Suggested for: Communication problems No forces at some place in universe?

Replies
7
Views
400
Replies
1
Views
139
Replies
19
Views
496
Replies
1
Views
602
Replies
6
Views
668
Replies
3
Views
394
Replies
12
Views
994
Back
Top