Question 2 :
In a uniform linear motion which of the following quantities remains zero?
Question 3 :
Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of $10\ ms^{-1}$. It implies that the boy is :<br/>
Question 4 :
The angular displacement of a particle is given by $\theta =t^{3}+t^{2}+t+1$ then, its angular velocity at $t = 2$ sec is _____ $rads^{-1}$ :<br/>
Question 7 :
In uniform circular motion, the velocity vector and acceleration vector are:
Question 8 :
The order of magnitude of revolution period of the earth around the sun is
Question 10 :
A 60-kg person on a merry-go round is travelling in a circle with a radius of $3 \ m$ at a speed of $ 6 \ m/s$. What is the magnitude of the net force experienced by this person?
Question 11 :
A boy is running along the circumference of a stadium with constant speed. Which of the following is changing in this case?
Question 12 :
Which one of the following is most probably not a case of uniform circular motion?
Question 13 : Circular Motion can be an example of periodic motion. <div>State whether the given statement is True or False.</div>
Question 14 :
(1) : In uniform circular motion the kinetic energy of the body is constant.<br/> (2) : In uniform circular motion the tangential force is zero.<br/>
Question 15 :
A particle moves in a circle describing equal angle in equal times, its velocity vector
Question 16 :
Assertion(A): In uniform circular motion the particle has zero acceleration.<br/>Reason (R) : Centripetal force is essential to keep a particle in circular motion.<br/>
Question 17 :
Name a physical quantity that remains constant in a uniform circular motion.<br/>
Question 19 :
(1) : In uniform circular motion the kinetic energy of the body is constant.<br/> (2) : In uniform circular motion the tangential force is zero.<br/>
Question 21 :
A particle is moving in a horizontal circle with constant speed. It has constant <br>
Question 22 :
Uniform linear motion is a/an _______ motion while uniform circular motion is a/an _______ motion.
Question 23 :
What happens to the centripetal acceleration of a revolving body if you double the orbital speed $v$ and half angular velocity $\omega $
Question 24 :
A particle of mass $M$ is moving in a horizontal circle of radius $R$ with uniform speed $v$. When the particle moves from one point to a dramatically opposite point, its
Question 25 :
A fan is running at $3000\ rpm$. It is switched off. It comes to rest by uniformly decreasing its angular speed in $10\ seconds$. The total number of revolutions in this period.
Question 26 :
A circular disc is rotating about its own axis at uniform angular velocity $\omega$. The disc is subjected to uniform angular retardation by which its angular velocity is decreased to $\dfrac{\omega}{2}$ during $120$ rotations. The number of rotations further made by it before coming to rest is:<br>
Question 27 :
A particle moves with a uniform speed of 5 m/s in a circular path. If the speed increases to 8 m/s in the 20th second. The motion of the particle in the 22nd second will be
Question 28 :
A particle moving at a circle. If at an instant its linear velocity vector, angular velocity and position vector are $\overline { v } , \overline { \omega }$ and $\vec { r }$ respectively then, the correct option is<br/>
Question 29 :
Assertion: It is possible to accelerate even if you are travelling at constant speed.
Reason: In the uniform circular motion, even if the particle has the constant speed, it has an acceleration.
Question 30 :
Revolution of the electron around the nucleus of an atom is an example of uniform circular motion.
Question 31 :
Two particles move on a circular path (one just inside and the other just outside) with angular velocities $\omega $ and $ 5 \omega $ starting from the same point. Then:<br>
Question 32 :
A particle of mass $10\ g$ moves along a circle of radius $6.4\ cm$ with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to $8 \times {10}^{-4} J$ by the end of the second revolution after the beginning of the motion?
Question 33 :
A particle has initial velocity, $\displaystyle \vec{v}=3\hat{i}+4\hat{j}$ and a constant force $\displaystyle \vec{F}=4\hat{i}-3\hat{j}$ acts on it. The path of the particle can be:
Question 34 :
A merry-go-round, made of a ring-like platform of radius R and mass M. is revolving with angular speed $\omega$? A person of mass M is standing on it. At one instant., the person jumps off the<br>round, radially away from the center of the round (as seen from the round). The speed of the round afterwards is:
Question 35 :
When seen from below , the blades of a ceiling fan are seen to be revolving anticlockwise and their speed is decreasing. Select correct statement about the direction of its angular velocity and angular acceleration.
Question 37 :
A disc rotates about its axis with a constant angular acceleration of $4$ rad$/s^2$. Find the radius tangential accelerations of a particle at a distance of $1$ cm from the axis at the end of the second after the disc starts rotating.
Question 38 :
Find the average acceleration between points A and B at an angular separation of $60^{\circ}$<br>
Question 39 :
The velocity of a car travelling on a straight road is $3.5km{ h }^{ -1 }$ at an instant of time. Now travelling with uniform acceleration for $10s$ the velocity becomes exactly double. If the wheel radius of the car is $25cm$, then which of the following is the closest to the number of revolutions that the wheel makes during this $10s$?
Question 40 :
A particle is moving in a circle of radius $R$ in such a way that at any instant the normal and tangential component of its acceleration are equal. If its speed at $t=0$ is $\displaystyle v_{0}.$ The time taken to complete the first revolution is
