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Consider two observers moving with respe...

Consider two observers moving with respect to each other at a speed v along a straighline. They observe a block of mass m movig a distasnce l on a rough surface. The following quantities will be same as observed by the two observers

A

kinetic energy of the block t tiem t

B

work doen by friction

C

tota work done the block

D

accelertion of the block

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • Consider two observers moving with respect to each other at a speed v along·a straight line. They observe a block of mass m moving a distance 1 on a rough surface. The following quantities will be same as observed by the observers

    A
    Kinetic energy of the block at time
    B
    Work done by friction
    C
    Total work done on the block
    D
    Acceleration of the block

  • When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave observed by the observer ?

    A
    More frequency, more wavelength
    B
    More frequency, more
    C
    Less frequency, less wavelength
    D
    More frequency, constant wavelength

  • An observer moves with a constant speed along the line joining two stationary objects. He will observe that the two objects

    A
    have the same speed
    B
    have the same velocity
    C
    move in the same direction
    D
    move in opposite directions

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