what is retardation (1 Viewer)

[viraj30]

i am starting to do mechanics questions and one of the statements in a question read "the retardation due to gravity is given by the law k/x^2 where x is the distance of the projectile from the centre of the earth, and k is a constant..

Now do i take k/x^2 as a graviational force or gravitational acceleration.. Please help as it can change the whole equation. Thanks!

 

[asianese]

Note that . The force CREATES an acceleration. (Physics). So the FORCE is . I don't see why it changes the question. The mass is included into the k I'm assuming

 

[viraj30]

http://virtualb15.edublogs.org/2011/05/31/ext2-topic-7-dynamics-qob-2/

open up exercise 8C..question 3 on page 1 and question 19 on page 3....u will notice a difference!

it is a .notebook file so u can use this website! http://express.smarttech.com/#

these are done by a teacher at BHHS

 

[viraj30]

bump

 

[Timske]

retardation is deceleration

 

[Nooblet94]

Note that . The force CREATES an acceleration. (Physics). So the FORCE is . I don't see why it changes the question. The mass is included into the k I'm assuming

It makes a huge difference - if it's gravitational acceleration then and if it's gravitational force then .

As far as I know, retardation refers to the acceleration caused by the resistive force, so it'd be the first one. I may be wrong though.

 

[asianese]

OH.. I see what he's talking about now. Sorry about that.