Problem on momentum, finding mass, in order to find the velocity.

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The discussion revolves around a physics problem related to momentum and mass. A user is struggling to find the value of "u" in the equation 4u, which represents mass. It is clarified that "u" refers to the unified atomic mass unit, as indicated in the provided document. The user expresses gratitude after receiving this clarification. Understanding the definition of "u" is essential for solving the problem effectively.
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In question 3 bi
http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_21.pdf
I am having trouble finding the value of u in 4u,(the mass). Can someone tell me how to find the value of u? Do i have to form a simultaneous equation first?
 
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It's given to you on page 2.
It's the unified atomic mass unit.
 
Simon Bridge said:
It's given to you on page 2.
It's the unified atomic mass unit.

okay got it, didnt know that. Thanx a tonne!
 

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