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Two masses 10 kg and 20kg resplectivley ...

Two masses 10 kg and 20kg resplectivley are connected by a massless spring as shown in figure. A force of 200 N acts one the 20 kg mass.At the instant shown is figure the 10 kg mass has acceleration of 12 `m//s^(2)`.The vlalue of acceleration of 20 kg mass is

A

`12(m)/(sec^2)`

B

`4(m)/(sec^2)`

C

`10(m)/(sec^2)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
As the mass of 10 kg has acceleration `12(m)/(s^2)` therefore it apply 120N force on mass 20 kg in a backward direction.
Net forward force on 20 kg mass`=200-120=80N`
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