MCQ
The angular speed of earth around its own axis is ......... $rad / s$
- ✓$\frac{\pi}{43200}$
- B$\frac{\pi}{3600}$
- C$\frac{\pi}{86400}$
- D$\frac{\pi}{1800}$
✓
Answer
Correct option: A.
$\frac{\pi}{43200}$
a
(a)
(a)
Angular speed $=\frac{2 \pi}{T}$
$T \rightarrow$ Time period of earth $=24 h$
$\omega=\frac{2 \pi}{24 \times 60 \times 60}=\frac{\pi}{43200} \,rad s ^{-1}$
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
For one complete cycle of a thermodynamic processes on a gas as shown in $P-V$ diagram. Which is true
→The correct value of ${0^o}C$ on the Kelvin scale is ........... $K$
→Measure of two quantities along with the precision of respective measuring instrument is:$\text{A} = 2.5\text{ms}^{-1} \pm 0.5\text{ms}^{-1}$
$\text{B} = 0.10\text{s} \pm 0.01\text{s}$
The value of A B will be,
→$\text{B} = 0.10\text{s} \pm 0.01\text{s}$
The value of A B will be,
A scooter of $40\,kg$ mass moving with velocity $4\,m/s$ collides with another scooter of $60\,kg$ mass and moving with velocity $2\,m/s.$ After collision the two scooters stick to each other the loss in kinetic energy .............. $\mathrm{J}$
→If masses of all molecule of a gas are halved and their speed doubled then the ratio of initial and final pressure will be:
A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film. When the portion $A$ punctured with a pin, the thread.
→An organ pipe is closed at one end has fundamental frequency of $1500 Hz$. The maximum number of overtones generated by this pipe which a normal person can hear is :
→A man moves in an open field such that after moving $10 \,m$ on a straight line, he makes a sharp turn of $60^{\circ}$ to his left. The total displacement just at the start of $8^{\text {th }}$ turn is equal to ........$m$
→The escape velocity or earth is $V$. If the mass of a certain planet is $3$ times and radius $3$ times than that of the earth, then the escape velocity from the planet will be:
→A ball of mass $400\, gm$ is dropped from a height of $5\,m.$ A boy on the ground hits the ball vertically upwards with a bat with an average force of $100$ newton so that it attains a vertical height of $ 20 \,m$. The time for which the ball remains in contact with the bat is ........... $\sec$. $[g = 10\,m/{s^2}]$
→