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The masses of 10 kg and 20 kg, respectiv...

The masses of 10 kg and 20 kg, respectively, are connected by a light spring as shown in the figure. A force of 200 N acts upon the 20 kg mass. At the instant shown, the 10 kg mass the acceleration of `12m//s^(2)`. The 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
`F_(s) = 10 (12) = 120 N`
`a_(20 kg) = (200 - 120)/(20) = 4 m//s^(2)` rightwards
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