MCQ
When an object is at rest
  • A
    Force is required to keep it in rest state
  • B
    No force is acting on it
  • A large number of forces may be acting on it which balance each other
  • D
    It is in vacuum

Answer

Correct option: C.
A large number of forces may be acting on it which balance each other
c
(c)

Object can be at rest only if net force acting on it is zero.

$\vec{F}_{\text {net }}=\vec{F}_1+\vec{F}_2+\vec{F}_3+\vec{F}_4+\ldots \ldots \ldots \vec{F}_n=0$

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

The motion of a particle of mass $m$ is given by $\text{x}=0$ for $\text{t} < 0\ \text{s},$
$\text{x}(\text{t})=\text{A}\sin4\text{p}\ \text{t}$ for $0<\text{t}<(1/ 4)\ \text{s}(\text{A}>\text{o}),$ and $\text{x}=0$ for $\text{t}>(1/4)\ \text{s}.$ Which of the following statements is true?
If you decide to launch a ball vertically to a friend located $45\ m$ above you who can catch it. What is the minimum launch speed you can use?
The temperature at which a black body of unit area loses its energy at the rate of $1$ joule/second is
The $x$-t graph of a particle undergoing simple harmonic motion is shown below. The acceleration of the particle at $t=4 / 3 \mathrm{~s}$ is
In an elevator moving vertically up with an acceleration $'g\ ',$ the force exerted on the floor by a passenger of mass $M$ is:
A uniform square plate $S$ (side $c$) and a uniform rectangular plate $R$ (sides $b$, $a$) ($a > b$) have identical areas and masses figure. Which of the following is correct

$(a)\ I_{xR}/I_{xS} <1;\  (b)\ I_{yR}/I_{yS}  >1; \  (c)\ I_{zR}/I_{zS} >1$

What is the value of linear velocity, if $\vec \omega = 3\hat i - 4\hat j + \hat k$ and $\vec r = 5\hat i - 6\hat j + 6\hat k$
$A$ ship $X$ moving due north with speed $v$ observes that another ship $Y$ is moving due west with same speed $v$. The actual velocity of $Y$ is $........$.
A body having volume $V$ and density $\rho$ is attached to the bottom of a container as shown. Density of the liquid is $d( > \rho )$. Container has a constant upward acceleration $a.$ Tension in the string is
The change in the value of acceleration of earth towards sun, when the moon comes from the position of solar eclipse to the position on the other side of earth in line with sun is: (mass of the moon $= 7.36 \times 10^{22}\,kg,$ radius of the moon's orbit $= 3 .8 \times 10^8\,m$ ).