MCQ
The position-time $(x-t)$ graph for positive acceleration is

  • B

  • C

  • D

Answer

Correct option: A.

a
$x=\frac{1}{2} a t^2 \quad$ (if coefficients of $t^2$ is positive $(a > 0)$ upward opening parabola)

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

A body having specific charge $8\,\mu {C} / {g}$ is resting on a frictionless plane at a distance $10\, {cm}$ from the wall (as shown in the figure). It starts moving towards the wall when a uniform electric field of $100 \,{V} / {m}$ is applied horizontally toward the wall. If the collision of the body with the wall is perfectly elastic, then the time period of the motion will be $....\, S.$
In $Y.D.S.E$. using light of wavelength $\lambda$, intensity of light at a point on the screen with path differnce $\lambda$ is $M$ unit. Calculate intensity of light at a point where path difference is $\frac{\lambda }{3}$ is
Two vertical walls are separated by a distance of $2\  m$. Wall $A$ is smooth while wall $B$ is rough with a coefficient of friction $0. 5$. A uniform rod is placed between them as shown. The length of longest rod that can be placed between walls is equal to
A cuboid $ABCDEFGH$ is anisotropic with $\alpha_x = 1 × 10^{-5} /^o C$, $\alpha_y = 2 × 10^{-5} /^o C$, $\alpha_z = 3 × 10^{-5} /^o C$. Coefficient of superficial expansion of faces can be
If $T$ be the surface tension, the amount of work done in blowing a soap bubble from a diameter $d$ to diameter $D$ is
Two long current carrying conductors are placed parallel to each other at a distance of $8 \,cm$ between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is $300 \,\mu T$. The equal current flowing in the two conductors is ...............
A satellite with kinetic energy ${E_k}$ is revolving round the earth in a circular orbit. How much more kinetic energy should be given to it so that it may just escape into outer space
Match List $I$ with List $II$

List $I$ List $II$
$A$ Spring constant $I$ $(T ^{-1})$
$B$ Angular speed $II$ $(MT ^{-2})$
$C$ Angular momentum $III$ $(ML ^2)$
$D$ Moment of Inertia $IV$ $(ML ^2 T ^{-1})$

Choose the correct answer from the options given below

A shell fired from a gun at an angle to the horizontal explodes in mid air. Then the centre of mass of the shell fragments will move
If the sum of the heights of transmitting and receiving antennas in the line of sight of communication is fixed at $160\, {m}$, then the maximum range of LOS communication is $....{km}$

(Take radius of Earth $=6400\, {km}$ )