Question

In the situation shown in figure, the tension in the string connecting the two blocks will be (string is massless and frictional force is negligible)

• A. 20 N
• B. 25 N
• C. 30 N
• D. 18 N

Answer 1

The correct option is C 30 N

In this situation shown in the figure.

The transmission in the string connecting the two blocks will be

In first block

Applying force$=10N$

Let, the tension between two blocks$=T$

Now,

$10-T=4f\to \left(1\right)$

(where F be the acceleration of the system )

And

$30-T=6f\to \left(2\right)$

Now solving the equation and we will get,

$10-T=4f30-T=6f$

$-+---------20=-2ff=10m/s^{2}10-T=4\times 10T=30N$