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A : Internal forces can change the kinet...

A : Internal forces can change the kinetic energy but not the momentum of the system.
R : The net internal force on a system is always zero.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

C

If Assertion is true statement but Reason is false, then mark (3).

D

If both Assertion and Reason are falsė statements, then mark (4).

Text Solution

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Internal force can change

Show that internal forces can change the kinetic energy but not linear momentum .

Knowledge Check

  • The internal energy of a system is

    A
    state function
    B
    path property
    C
    qualitative property
    D
    intensive property

  • In net force on a system is zero then

    A
    its momentum is conserved
    B
    Its kinetic energy may increase
    C
    The acceleration of it’s a constitutent particle may be non - zero
    D
    All of these

  • Consider the following statements I. The rate of change of the total linear momentum of a system consisting of many particles is proportional to the vector sum of all the internal forces due to inter-particle interaction. The internal forces can change the kinetic energy of the system of particles are not the linear momentum of the system. Choose the correct option.

    A
    Only I
    B
    Only II
    C
    I and II
    D
    None of these

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    Choose the correct statement regarding a system of particles. Internal forces can change the kinetic energy of the system without changing system's momentum O Impulse can be defined as a very large force that acts for a very short time and causes finite change in momentum. Internal forces can change the potential energy of the system without changing system's momentum Internal forces can change the mechanical energy of the system without changing system's momentum.

    If net external force acting on the system is zero then

    Statement-1 : Internal forces can change total linear momentum of system. Statement-2 : Due to work of internal forces kinectic energy of system may change.

    If net external force acting on the system is zero then

    Assertion : Internal forces acting on the system cannot change linear momentum of the system . Reason : Internal forces can change kinetic energy of the system.

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