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

Answer

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

$Assertion$ : Moment of inertia depends on the axis of rotation and the nature of distribution of the mass of the body.
$Reason$ : Moment of inertia is the rotational inertia of the body
A steel wire of length ' $L$ ' at $40^{\circ}\,C$ is suspended from the ceiling and then a mass ' $m$ ' is hung from its free end. The wire is cooled down from $40^{\circ}\,C$ to $30^{\circ}\,C$ to regain its original length ' $L$ '. The coefficient of linear thermal expansion of the steel is $10^{-5} { }^{\circ}\,C$, Young's modulus of steel is $10^{11}\, N /$ $m ^2$ and radius of the wire is $1\, mm$. Assume that $L \gg $ diameter of the wire. Then the value of ' $m$ ' in $kg$ is nearly
1 mole of an ideal gas is contained in a cubical volume V, ABCDEFGH at 300K (figure). One face of the cube (EFGH) is made up of a material which totally absorbs any gas molecule incident on it. At any given time,
A transverse harmonic wave on a string is given by $y(x, t)=5 \sin (6 t+0.003 x)$ where $x$ and $y$ are in $cm$ and $t$ in $sec$. The wave velocity is $...........\,ms ^{-1}$.
The blocks $A$ and $B$ are arranged as shown in the figure. The pulley is frictionless. The mass of $A$ is $10 \,kg$. The coefficient of friction of $A$ with the horizontal surface is $0.20$. The minimum mass of $B $ to start the motion will be...... $kg$ 
Three identical rods, each of length $l$, are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the plane of the triangle is
A $60 \,kg$ weight is dragged on a horizontal surface by a rope upto $ 2$ metres. If coefficient of friction is $\mu = 0.5$, the angle of rope with the surface is $60^°$ and $g = 9.8\,m/{\sec ^2}$, then work done is ........ $joules$
Two identical springs of spring constant $'2k'$ are attached to a block of mass $m$ and to fixed support (see figure). When the mass is displaced from equilibrium position on either side, it executes simple harmonic motion. The time period of oscillations of this sytem is ...... .
A soap bubble ( surface tension $= T$) is charged to a maximum surface density of charge $ = \sigma $. When it is just going to burst. Its radius $R$ is given by
The moleculear motion equation of gases is: