1. A nut is opened by a wrench of length $20 \text{ cm}$. If the least force required is $2 \text{ N}$, the moment of force needed to turn the nut is:
2. Why does a stone tied to a string and whirled in a circle fly off tangentially if the string breaks?
3. For a uniform half-meter scale, the center of gravity is located at:
4. The work done by a centripetal force is always zero because:
5. A uniform meter scale of weight $W$ is pivoted at its $40 \text{ cm}$ mark. It balances horizontally when a weight of $20 \text{ gf}$ is suspended at the $20 \text{ cm}$ mark. The value of $W$ is:
6. Which of the following statements about Centrifugal Force is CORRECT?
7. A physical balance works on the principle of:
8. If a body is rotating with a constant angular velocity, the net torque acting on it is:
9. The center of gravity of a hollow cone of height $h$ lies on its axis at a distance from the base equal to:
10. Two forces each of magnitude $10 \text{ N}$ act vertically upwards and downwards respectively at the two ends of a uniform rod of length $1 \text{ m}$ pivoted at its center. The resultant moment is:
11. A body is in stable equilibrium. If it is slightly tilted, its center of gravity:
12. Smallest force required to produce a given moment of force is applied:
13. In a uniform circular motion, which of the following remains constant?
14. The center of gravity of an L-shaped thin uniform rod of length $2a$ (each arm length $a$) lies:
15. A nut is opened by a handle of length $0.5 \text{ m}$. If a force of $10 \text{ N}$ is required, the moment of force is:
16. The direction of the moment of force is determined by:
17. A force $F$ acts on a rigid body which is free to move. The body will undergo:
18. To increase the stability of a car, its center of gravity should be:
19. If the Earth suddenly stops rotating, the value of 'g' at the equator will:
