Warning: Illegal string offset 'html' in /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php on line 909

Warning: Cannot modify header information - headers already sent by (output started at /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php:909) in /home/hsn/public_html/forum/admin/sources/classes/output/formats/html/htmlOutput.php on line 114

Warning: Cannot modify header information - headers already sent by (output started at /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php:909) in /home/hsn/public_html/forum/admin/sources/classes/output/formats/html/htmlOutput.php on line 127

Warning: Cannot modify header information - headers already sent by (output started at /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php:909) in /home/hsn/public_html/forum/admin/sources/classes/output/formats/html/htmlOutput.php on line 136

Warning: Cannot modify header information - headers already sent by (output started at /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php:909) in /home/hsn/public_html/forum/admin/sources/classes/output/formats/html/htmlOutput.php on line 137

Warning: Cannot modify header information - headers already sent by (output started at /home/hsn/public_html/forum/cache/skin_cache/cacheid_1/skin_topic.php:909) in /home/hsn/public_html/forum/admin/sources/classes/output/formats/html/htmlOutput.php on line 141
Question - HSN forum

Jump to content


Question


3 replies to this topic

#1 Floorball Maniac

    Child Prodigy

  • Members
  • PipPipPipPipPipPip
  • 708 posts
  • Gender:Male
  • Gender:Male

Posted 12 May 2006 - 07:58 AM

I am probably missing something obvious here but I do not get this question.

Calculate the speed at which the reletavistic mass of an object is equal to three times its rest mass.

There is no other information in the question. It is worth 2 marks. Can anyone help me here?

Thank you!

#2 colinH

    Showing Improvement

  • Members
  • PipPip
  • 14 posts
  • Location:Cumbernauld
  • Gender:Male

Posted 12 May 2006 - 10:57 AM

since the relativistic mass is equal to 3 times the rest mass, you can replace m in the equation for 3mo
i.e

3 mo = ( mo / (1- (v^2 / c^2))^1/2

then rearrange to get:

3 mo * (1 - (v^2/c^2))^1/2 = mo

so divide through by 3 mo to get

(1 - (v^2 / c^2))^1/2 = 0.333 (a third)

so (1 - (v^2 / c^2)) = 0.111 (square both sides)

so (v^2 / c^2) = 0.888

so (V^2) = 0.888 * c^2

= 8*10^16

therefore v = 2.83*10^8 ms-1

sorry I don't know how to show square root signs and things so it is a bit confusing but I hope this helps! biggrin.gif

#3 Floorball Maniac

    Child Prodigy

  • Members
  • PipPipPipPipPipPip
  • 708 posts
  • Gender:Male
  • Gender:Male

Posted 12 May 2006 - 11:26 AM

Superb help! Thank you very much!

#4 Jason Bourne

    Good Effort

  • Members
  • PipPipPip
  • 95 posts
  • Gender:Male

Posted 12 May 2006 - 10:08 PM

for the coding follow this link:

latex coding

click on the images of the coding and you will be shown how they write it

Nothing!!!!!!!!





1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users