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 an example of Newton's third law?

Yes, No

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Yes, Yes,

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No, No

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No, Yes

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Solution

The correct option is A
Yes, No

When the spring is stretched, the force it applies on A and B will be equal and opposites. But the active reaction pair is the force on A by the spring and the force on the spring by A. and similarly the force on B by the spring and the force on the spring by B.

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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 an example of Newton's third law?

A block of mass 2 kg is pushed normally against a rough vertical wall with a force of 40 N, co-efficient of static friction being 0.5. Another horizontal force of 15 N is applied on the block in a direction parallel to the wall. Will the block move? If yes, in which direction and with what acceleration? If no, find the frictional force exerted by the wall on the block.

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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 an example of Newton's third law?

The correct option is A Yes, No When the spring is stretched, the force it applies on A and B will be equal and opposites. But the active reaction pair is the force on A by the spring and the force on the spring by A. and similarly the force on B by the spring and the force on the spring by B.

The correct option is A
Yes, No

When the spring is stretched, the force it applies on A and B will be equal and opposites. But the active reaction pair is the force on A by the spring and the force on the spring by A. and similarly the force on B by the spring and the force on the spring by B.