The masses of `10kig` and `20kg` respectively are connected by a massless spring as shown in figure. A force of `200N` acts on the `20kg` mass. At the instant shown, the `10kg` mass has acceleration `12m//sec^(2)` . What is the acceleration of `20kg` mass? A. `12m//sec^(2)`B. `4m//sec^(2)`C. `10m//sec^(2)`D. Zero

The masses of `10kig` and `20kg` respectively are connected by a massl

1.	The masses of `10kig` and `20kg` respectively are connected by a massless spring as shown in figure. A force of `200N` acts on the `20kg` mass. At the instant shown, the `10kg` mass has acceleration `12m//sec^(2)` . What is the acceleration of `20kg` mass? A. `12m//sec^(2)`B. `4m//sec^(2)`C. `10m//sec^(2)`D. Zero
Answer» Correct Answer - B As the mass of `10kg` has acceleration `12m//s^(2)` therefore it apply `120N` force on mass `20kg` in a backward direction. :. Net forward force on `20kg` mass `=200-120=80N` :. acceleration of the block is `=(4kx)/(m)` .

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