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sir please answer this quotion


sir please answer this quotion

Grade:11

1 Answers

priyank sharma
37 Points
10 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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