MCQ
The adjoining diagram shows the velocity versus time plot for a particle. The work done by the force on the particle is positive from

Image

  • $A$ to $B$
  • B
    $B$ to $C$
  • C
    $C$ to $D$
  • D
    $D$ to $E$

Answer

Correct option: A.
$A$ to $B$
(a) From the graph it is clear that force is acting on the particle in the region $A B$ and due to this force kinetic energy (velocity) of the particle increases.Sotheworkdonebytheforce is positive.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length $+20 \mathrm{~cm}$ when in air and its material has refractive index $1.50.$ If the liquid has refractive index $1.60,$ the focal length of the system is
Image
A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is $5 m$, the number of ball thrown per minute is (take $g=10 ms ^{-2}$ )
A man is standing at the centre of frictionless pond of ice. How can he get himself to the shore
A cyclic process for $1$ mole of an ideal gas is shown in figure in the $V-T$, diagram. The work done in $A B, B C$ and $C A$ respectively
Image
As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is $E, I$ and $Q$ respectively. If the speed of the magnet is doubled, the incorrect statement is
Image
The north pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of the induced current in the conducting plane will be
7. A $1 kg$ stone at the end of $1 m$ long string is whirled in a vertical circle at constant speed of $4 m / sec$. The tension in the string is $6 N$, when the stone is at $(g=10 m / sec )$
A diverging beam of light from a point source $S$ having divergence angle $\alpha$, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is $t$ and the refractive index $n$, then the divergence angle of the emergent beam is
$n$ small balls each of mass $m$ impinge elastically each second on a surface with velocity $u$. The force experienced by the surface will be
The direction of current in an iron-copper thermocouple is