Question

Three blocks of masses 2kg 3kg 4kg are connected to each other with light string and are then placed on friction less surface. the force 10newtons is applied on 2kg​

Answer 1

Given:

Three blocks of masses 2 kg, 3 kg and 4 kg are connected to each ohter with light string and are placed on a frictionless surface.

The force of 10 N is applied on 2 kg block.

To Find:

Acceleration of masses

Solution:

 external force on the system is 10N

Other than that, there is no external force of friction

Hence all the blocks will move together as a system due to the influence of 10 N force.

Total mass of the system = 9 kg.

Tension in the strings are internal forces and they cancel each other.

F(net ) = ma

F(net)= 10 N

10 N =( mass of system)(acceleration of the system)

$10 = 9a\\a = \frac{10}{9} \frac{m}{s^{2} }$

Acceleration of the system is equal to $\frac{10}{9}\frac{m}{s^{2} }$