sir please answer this quotion
rohan bhatia , 15 Years ago
Grade 11
Mechanics> laws of motion
1 Answers
priyank sharma
Last Activity: 14 Years ago
well the ans is b option .
for this question you must know that when the string is cut the spring force does not change immidietly,
so before cutting,at b
mg=kx
at a,
mg +kx=tension
now after cutting,
at b,
mg=kx (as the spring force does not change)
at a,
mg+kx=ma
as kx =mg
then a=2g.
regards
prick
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