MCQ
body moves with constant angular velocity on a circle. Magnitude of angular acceleration
- A$r\omega^2$
- BConstant
- ✓Zero
- DNone of the above
✓
Answer
Correct option: C.
Zero
c
(c) $\alpha = \frac{{d\omega }}{{dt}} = 0$ (As $\omega$ = constant)
(c) $\alpha = \frac{{d\omega }}{{dt}} = 0$ (As $\omega$ = constant)
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following is not a physical quantity?
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative $x$-axis. Identify the correct statement $(s)$ related to the movement of the points shown in the figure. The points of maximum compression are
→The potential energy function (in J) of a particle in a region of space is given as $U=\left(2 x^2+3 y^3+2 z\right)$. Here $\mathrm{x}, \mathrm{y}$ and $\mathrm{z}$ are in meter. The magnitude of $\mathrm{x}$ - component of force (in $\mathrm{N}$ ) acting on the particle at point $\mathrm{P}(1,2,3)\ \mathrm{m}$ is:
→By opening the door of a refrigerator placed inside a room you
In the given diagram, one graph is of an ideal gas and another is of a real gas. Select the correct option.
A lift of mass $M =500\,kg$ is descending with speed of $2\,ms ^{-1}$. Its supporting cable begins to slip thus allowing it to fall with a constant acceleration of $2\,ms ^{-2}$. The kinetic energy of the lift at the end of fall through to a distance of $6 m$ will be $...........kJ.$
→The accelerations of a particle as seen from two frames S1 and S2 have equal magnitude 4m/s2.
- The frames must be at rest with respect to each other.
- The frames may be moving with respect to each other but neither should be accelerated with respect to the other.
- The acceleration of S2 with respect to S1 may either be zero or 8m/s2.
- The acceleration of S2 with respect to S1 may be anything between zero and 8m/s.
A ball is thrown vertically downwards from a height of $20\, m$ with an initial velocity $v_0$, It collides with the ground, loses $50$ percent of its energy in collision and rebounds same height. The initial velocity $v_0$ .................... $\mathrm{ms}^{-2}$ (Take $g=10 \,ms^{-2}$)
→Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium $M_1=4\ g$ and that of hydrogen $M_2=2\ g$ The equivalent value of $\gamma$ is
→An AC source rated 100V (rms) supplies a current of 10A (rms) to a circuit. The average power delivered by the source:
- Must be 1000W.
- May be 1000W.
- May be greater than 1000W.
- May be less than 1000W.