MCQ
Select WRONG statement about centre of mass:
  • A
    Centre of mass of a ‘C’ shaped uniform rod can never be a point on that rod.
  • B
    If the line of action of a force passes through the centre of mass, the moment of that force is zero.
  • C
    Centre of mass of our Earth is not at its geometrical centre.
  • While balancing an object on a pivot, the line of action of the gravitational force of the earth passes through the centre of mass of the object.

Answer

Correct option: D.
While balancing an object on a pivot, the line of action of the gravitational force of the earth passes through the centre of mass of the object.
While balancing an object on a pivot, the line of action of the gravitational force of the earth passes through the centre of mass of the object.

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 unit of expression $\mu_0 0 \varepsilon_0$ is
The magnitude of vector product of two unit vectors making an angle of 60° with each other is
A bomber plane moves horizontally with a speed of 500 m/s and a bomb released from it, strikes the ground in 10 s. Angle at which it strikes the ground will be
$\left( g =10 m / s ^2\right)$
The acceleration a of a particle starting from rest varies with time, according to relation $a =\alpha t +\beta$. The velocity of the particle after a time t will be
If the escape velocity of a body on Earth is 11.2 km/s, the escape velocity of the body thrown at an angle 45° with the horizontal will be
Which of the following electromagnetic wave has least wavelength?
A body is projected vertically upwards with a velocity of $10 ms^{-1}$ and another body is projected simultaneously from the same point with a velocity of $20 ms^{-1}$ at an angle of $\frac{\pi}{6}$ with the horizontal. The distance between the bodies after one second from the time projection is (Acceleration due to gravity $\left.10 ms^{-2}\right)$
A satellite of mass ' $m$ ' is revolving in a circular orbit of radius ' $r$ ' round the earth. Its angular momentum w.r.t. the centre of its orbit is $(M=$ mass of earth, $G=$ universal gravitational constant)
Two cars $C_1$ and $C_2$ are going round in concentric circles of radii $R_1$ and $R_2$. They complete the circular paths in the same time. Then $\frac{\text { Speed of } C_1}{\text { Speed of } C_2}=$
The direction of torque is given by _______________ .