MCQ
In circular motion, the centripetal acceleration is given by
  • A
    $\vec a\,\times \,\vec r$
  • $\vec \omega \,\times \,\vec v$
  • C
    $\vec a\,\times \,\vec v$
  • D
    $\vec \omega \,\times \,\vec r$

Answer

Correct option: B.
$\vec \omega \,\times \,\vec v$
b
The centipetal acceleration is given by $\vec{\omega} \times \overrightarrow{ V }$

This term $\vec{\omega} \times \overrightarrow{ V }$ is centipetal acceleration.

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

An ideal gas is in thermodynamic equilibrium. The number of degrees of freedom of a molecule of the gas in $n$. The internal energy of one mole of the gas is $U_n$ and the speed of sound in the gas is $v_n$. At a fixed temperature and pressure, which of the following is the correct option?
An object is thrown from the surface of the moon. The escape speed for the object is:
Range of a bullet fired at $45^o$ to horizontal is $980m$. If the bullet is fired at same  angle from a car travelling horizontally at $18\, km/hr$ towards target then range will be  increased by :-
In the figure shown, a balloon is pressed against a wall. It is in equilibrium and maximum compresed state.$\vec F_1\,=$ force of balloon on hand of man $;$  $\vec F_2\,=$  force of balloon on wall $;$  $\vec F_3\,=$ friction $;$ $\vec F_4=$  weight of balloon. Choose the correct statement.
Which is the correct statement
The amount of heat energy $Q$, used to heat up a substance depends on its mass $m$, its specific heat capacity $(s)$ and the change in temperature $\Delta T$ of the substance. Using dimensional method, find the expression for $s$ is (Given that $\left.[s]=\left[ L ^2 T ^{-2} K ^{-1}\right]\right)$ is
$Assertion :$ Perspiration from human body helps in cooling the body.
$Reason :$ A thin layer of water on the skin enhances its emissivity.
A flat plate moves normally with a speed ${v_1}$ towards a horizontal jet of water of uniform area of cross-section. The jet discharges water at the rate of volume $V$ per second at a speed of ${v_2}$. The density of water is $\rho $. Assume that water splashes along the surface of the plate at right angles to the original motion. The magnitude of the force acting on the plate due to the jet of water is
The temperature of the mixture of one mole of helium and one mole of hydrogen is increased from 0°C to 100°C at constant pressure. The amount of heat delivered will be:
The coefficient of volume expansion is :