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Two blocks of masses 10 kg and 20 kg are...


Two blocks of masses 10 kg and 20 kg are connected by a light spring as shown. A force of 200 N acts on the 20 mass as shown. At a certain instant the acceleration of 10 kg mass is 12 `ms^(-2)` towards right direction.

A

At that instant the 20 kg mass has an acceleration of `12ms^(-2)`

B

At that instant the 20 kg mass has an acceleration of `4ms^(-2)`

C

the strecthing force in the spring is 120 N.

D

None of these.

Text Solution

Verified by Experts

The correct Answer is:
B, C

Apply NLM on the system
`200=20a+12xx10`
`(80)/(20)=a`
`=4(m)/(s^(2))`
spring force `=10xx12=120N`
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