25 779
Assignments Done
Successfully Done
In March 2015
Your physics homework can be a real challenge, and the due date can be really close - feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world's newest programming trends.
Get a free quote.
Check the website
for updates.
Receive your completed assignment.
Easy as ABC!
Just provide us with clear instructions and wait for the completed assignment.

Answer on Mechanics | Kinematics | Dynamics Question for hem raj

Question #27527

State against each observation below whether it is true or false. Give reasons for your answer.
i. The angular momentum of an artificial satellite rotating about the earth under its gravitation
varies with time
ii. An alpha particle scattered from an atomic nucleus moves in a plane.
iii. An artificial satellite moves at greater speed when it is nearer the earth.

Expert's answer

i. False
Angular momentum can not change, because force acting on the satellite (gravitational force) is oriented along the radius-vector that connects satellite and the center of orbit. Force torque is 0, and so, it can not change angular momentum of satellite
ii. True
This is true, because force, acting on particle, is central force - it acts along the vector that connects the alpha particle and nucleus and this vector is in plane of motion. Hence, there will be no z-component of acceleration and of motion.
iii. True
When satellite comes closer to Earth, its potential energy decreases. Because of energy conservation law, the kinetic energy increases on the same amount, and thus, it has greater speed.


No comments

Leave a comment

Related Questions

Link to us

Share with friends

free questions
Questions and Answers
approved by clients
This task was well done, thanks for all your efforts I got full marks, you guys are great
Pasha on September 2013
solving policy
solving policy
Pay us safely via PayPalPayPal
We deliver professional assignment and homework help for students in USA, UK, Canada, Australia, AE and all over the world.
Terms and Conditions | Privacy Policy | Service
© 2015 BrainRouter LTD. All rights reserved.