Lessons

Eamcet Physics
1 st Year : Unit 3.2( Laws of Motion ) - Connected Bodies

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Q.

Two blocks of masses 10 kg and 20 kg are connected by a massless spring and are placed on a smooth horizontal surface. A force of 200 N is applied on 20 kg mass as shown in the diagram. At the instant, the acceleration of 10 kg mass is 12 ms–2, the acceleration of 20kg mass is,

View Answer

Correct choice: A

Explanation:

T = 10a = 10 x 12,
T = 120N
200 – T = 20a,
200 – 120 = 20a
80 = 20a,
a = 4 ms–2
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