Angular Acceleration

Q. A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first 2 sec, it rotates through an angle ${\theta }_1$. In the next 2 sec, it rotates through an additional angle ${\theta }_2$ . The ratio of angles is

1. 1
2. 2
3. 3
4. 5

Q. A wheel is rolling on a horizontal plane. At a certain instant, it has a velocity ${}^{\prime }{v}^{\prime }$ and acceleration ${}^{\prime }{a}^{\prime }$ of CM as shown in figure. Acceleration of

1. $A$ is vertically upwards
2. $B$ may be vertically downwards
3. $C$ cannot be horizontal
4. some points on the rim may be horizontal leftwards

Q. In figure (i), half of the meter scale is made of wood while the other half of steel. The wooden part is pivoted at $O$ and a force $F$ is applied at the end of steel part. In figure (ii), the steel part is pivoted at $O$ and the same force is applied at the wooden end.

1. More angular acceleration will be produced in (i)
2. More angular acceleration will be produced in (ii)
3. Same angular acceleration will be produced in both the conditions
4. Information is incomplete

Q. The angular acceleration of the body shown below is ___

1. 2 rad/s/s
2. 3 rad/s/s
3. 1 rad/s/s
4. 0 rad/s/s

Q. A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first 2 sec, it rotates through an angle ${\theta }_1$. In the next 2 sec, it rotates through an additional angle ${\theta }_2$ . The ratio of angles is

1. 1
2. 2
3. 3
4. 5

Q. The angular acceleration of the body shown below is ___

1. 2 rad/s/s
2. 3 rad/s/s
3. 1 rad/s/s
4. 0 rad/s/s