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Match the following : {:(,"Column-I",,...

Match the following :
`{:(,"Column-I",," Column-II"),("(A)","Work done by all the forces",,"(P)Change in potential energy"),("(B)","Work done by conservative forces",,"(Q) Change in kinetic energy"),("(C)","Work done by external forces",,"(R) Change in mechanical energy"),(,,,"(S) None"):}`

Text Solution

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The correct Answer is:
A - Q, B - S, C - R
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A particle of mass m kg is displaced from one given point to another given point under the action of several conservative and non conservative forces (Neglect relativistic considerations) Now match the following . {:(,"Column-1",," Column-2"),("(A)","Displacement of particle",,"(P) Path dependent"),("(B)","Work done conservative force",,"(Q) Path independent"),("(C)","Work done by non-conservative force",,"(R) Frame dependent"),("(D)","Angular displacement",,"(S) Frame independent"),(,,,"(T) Dependent on location of observer in a given frame"):}

Work done by various forces, Potential and kinetic energy. Conservative and non conservative forces

Knowledge Check

  • Work done by the conservative force on a system is equal to :

    A
    the change in kinetic energy of system
    B
    the change in potential energy of system
    C
    the change in total machanical energy of system
    D
    None of the above

  • The work done by the external forces on a system equals the change in

    A
    total energy
    B
    kinetic energy
    C
    potential energy
    D
    none of these

  • When work is done on a body by an external force, its

    A
    Only kinetic energy increases
    B
    Only potential energy increases
    C
    Both kinetic and potential energies may increase
    D
    Sum of kinetic and potential energies remains constant

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    Explore conceptually related problems

    Acceleration versus x and potential energy versus x graph of a particle moving along x-axis is as shown in figure. Mass of the particle is 1 kg and velocity at x = 0 is 4 m/s. Match the following at x = 8m. {:(,"column I","columnII",),((A),"Kinetic Energy",(P),120 J),((B),"Work done by conservative forces", (Q) 240 J,),((C),"Total work done on the particle", (R) 128 J,),((D),"Work done by forces other than conservative forces", (S) 112J,),(,,(T),"None"):}

    Match column - I with column -II {:(,"Column -I",,"Column -II"),("(a)","Gravitational force",,"(p)Central"),("(b)","Viscous force",,"(q) Non-conservative"),("(c)","Electric force",,"(r) Conservative"),("(d)","Friction",,"(s) Mechanical energy is conserved"):}

    When work is done on a body by an external force, its

    A : Work done by the frictional force can’t be positive. R : Frictional force is a conservative force.

    The total work done on a particle is equal to the change in its mechanical energy

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