Limitations of string law - Mechanics

Q.  What are the limitations of string law?
- Published on 18 Sep 15

a. Direction of motion cannot be specified
b. Valid only when more than three particles are connected by a single string
c. Both a. and b.
d. None of the above

ANSWER: Direction of motion cannot be specified

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    Discussion

  • Sravanthi   -Posted on 15 Dec 15
    - According to string law, when two particles are connected by a continuous, inextensible string passing over smooth pulleys then the relation between the two strings remains good.

    Ns1 = Ns2 , Nv1 = Nv2, Na1 = Na2.

    Here, N1 and N2 are string parts which are connected to particles two particles respectively.

    - This relation determines different quantities in magnitude.

    - Therefore. It has limitations such as:

    1) This law is valid only if single string connects two particles.

    2) This law does not give results regarding direction of motion.

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