Two blocks of unequal masses are tied by a spring. The blocks are pulled stretching the spring slightly and the system is released on a frictionless horizontal platform. Are the forces due to the spring on the two blocks equal and opposite. If yes, is it can example of Newton's third law?

Two block of equal mass m are connected by an unstretched spring and the sytem is kept at rest on a frictionless horizontal surface. A constant force F is applied on one of the blocks puling it away from the other as shown in figure. a.Find the positon of the centre of mass at time t. b.If the extansion of the spring is x_0 at time t find the displacement of the two blocks at this instant.

Two blocks of equal mass m are tied to each other through light string. One of the blocks is pulled along the line joining them with a constant force F. Find the tension in the string joining the blocks.

Two equal masses are attached to the two ends of a spring of spring constant k. The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring one each mass is

Two blocks of masses 10 kg and 4 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 14 m's to the heavier block in the direction of the lighter block. The velocity of the center of mass is

Two blocks of masses 20 kg and 5 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 15 m/s to the heavier block in the direction of lighter block. The velocity of centre of mass is

Two blocks of equal mass m are connected by an unstreched spring and placed over a plank moving with an acceleration ′ a ′ as shown in figure. The coefficient of friction between the blocks and platform is μ.

The spring as shown in figure is kept in a stretched position with extension Xo when the system is released. Assuming the horizontal surface to be frictionless, the frequency of oscillation is

The two blocks in an Atwood machine have masses 2.0 kg and 3.0 kg. Find the work done by gravity during the fourth second after the system is released from rest.