Home
Class 11
PHYSICS
Asseration : Displacement time graph of ...

Asseration : Displacement time graph of a particle moving in a straight line is shown in figure. Work done by all the forces between time interval `t_(1)` and `t_(2)` is definitely zero.
,
Reason : Work done by all the forces is equal to change in kinetic energy.

A

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C

If Assertion is true, but the Reason is false

D

If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
`W_(All) =DeltaK =K_(f)-K_(i)`
`=1/2m(v_(f)^(2)-v_(i)^(2))`
`v_(f) =v_(t_2) =`Slope of `s-t` graph at `t_(2)`
`v_(i) =v_(t_1)=slope of st graph at t_(1)`
these two slopes are not necessarily equal.
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

The diagram shows the displacement - time graph for a particle moving in a straight line. The distance (in m) coverted by the particle in the time interval t=0 to t=5s is

The velocity -time (v - t) graph of a particle moving in a straight line is shown in figure. The acceleration of the particle at t = 9 is:

Knowledge Check

  • Displacement time graph of a particle moving in a straight line is a shown in figure.

    A
    in region `A` acceleration is positive
    B
    in region `B` acceleration is negative
    C
    in region `C` acceleration is positive
    D
    in region `D` acceleration is negative

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

    A
    always
    B
    only if the forces acting on ilt are conservative
    C
    only if gravitational force alone acts on it
    D
    only if elastic force alone acts on it

  • Displacement time graph of a particle moving in a straight line is as shown in figure. From the graph we can conclude that work done on the block is : .

    A
    positive from `0` to `t_(1)`
    B
    negative from `t_(1)` to `t_(2)`
    C
    zero from `t_(2)` to `t_(3)`
    D
    negative from `t_(3)` to `t_(4)`.

    • Similar Questions

    Explore conceptually related problems

    The x-t graph of a particle moving along a straight line is shown in figure The a-t graph of the particle is correctly shown by

    The x-t graph of a particle moving along a straight line is shown in figure The v-t graph of the particle is correctly shown by

    Variation of displacement x of a particle moving on a straight line with time t is shown in following figure. The figure indicates :

    The x-t graph of particle moving along a straight line is shown in figure The a-t graph of the particle is correctly shown by

    The position (x) - time (t) graph for a particle moving along a straight line is shown in figure. The average speed of particle in time interval t = 0 to t = 8 s is

    Home
    Profile