1. Period 2 Question 1

2. A rod rests on frictionless ice
A rod rests on frictionless ice. Forces that are equal in magnitude and opposite in direction are now simultaneously applied to its ends. The quantity which vanishes is
Angular momentum
Angular acceleration
Total linear momentum
Rotational inertia
Kinetic energy

3. Period 2 Question 2

4. The center of mass of a thin wooden half-ring (semicircle) lies (see Figure)
At the center C
In the middle of the rim at A
Somewhere on the line joining A and C
Bad question: the center of mass cannot lie outside the half-ring

5. Period 3 Question 1

6. According to Newton’s second law the angular acceleration that is experienced by an object is directly proportional to
Its moment of inertia
The net applied torque
The object’s size
Choices 1 and 2 are both valid

7. Period 3 Question 2

8. The center of mass of a thin wooden half-ring (semicircle) lies (see Figure)
At the center C
In the middle of the rim at A
Somewhere on the line joining A and C
Bad question: the center of mass cannot lie outside the half-ring