2. If the resultant of all the forces acting on the body is zero, then the body satisfies

3. A block of weight 12 N is hanging through a string. Its tension in the string will be

4. When the resultant torque acting on a body is zero, then the body satisfies

5. The study of the structure and properties of matter is called

6. We study the physical aspects of sound waves, their production, properties and applications under the branch named as

7. We study the physical aspects of light, its properties, working and use of optical instruments in the branch named as

8.The study of the properties and behavior of nuclei and the particles within the nuclei is called

9. The study of the charged at rest and in motion, their effects and their relationship with magnetism is called

10. If the object is at rest then the distance-time graph is

11. In a graph, in which time is taken along X-axis and speed is taken along Y-axis is called

12. The quantities between which a graph is plotted are known as

13. In distance-time graph time is taken on

14. The quantity whose value varies with the independent quantity is termed as

15. If the distance between all pairs of particles of the body do not change by applying a force then the body is said to be

16. The turning effect of a force is called the force's

17. The number of forces that can be added by head to tail rule are

18. The door is opened or closed due to the

19. A wooden cube of sides 10 cm each dipped in water. The up thrust of water would be

20. The up thrust of water acting on a wooden cube of sides 10cm immersed completely in water is

21. The up thrust of the body is equal to the

22. The density of metal spoon when its weight in air is 0.48 N and in water is 0.42 N is

23.  At sea level, the vertical height of the water column would be

24. At a height of about 30 km, the atmospheric pressure becomes

25. The density of mercury is

26. The Earth is surrounded by a cover of air called

27. (a required form of output/total input energy)×100 is equal to

28. The efficiency of the cyclist when he does 12 J of useful work from every 100 J of food energy he takes is

29. An body builder does 15 Joules of useful work from every 60 Joules of food energy which he takes. His efficiency will be

30. If some energy given to a system, then energy in the required form obtained is always

31. Thermal energy from a hot body flows to a cold body in the form of

32. Increasing atmospheric pressure with a decline, later on, predicts an

33. Racing cars are made stable by

34. A point where the whole weight of the body appears to act vertically downward is called

35. The maximum limit up to which stress is applied on the body without deformation is called

36. The ratio of stress to strain is

37. A cyclist of mass 30 kg exerts a force of 250 N to move his cycle. The acceleration is 4 ms⁻². The force of friction between the road and tires will be

38. The force that produces an acceleration of 1 ms⁻² in a body of the mass of 1 kg is called

39. When a net force act on a body, it produces acceleration in the body in the direction of the net force which is directly proportional to the net force acting on the body and inversely proportional to its mass. This statement is called

40. Mass of a body (m) into acceleration (a) is equal to

41. Once heats enter a body, it becomes its

42. Heat is also called

43. The substance which has the greatest average kinetic energy is

44. Normal human body's temperature is

45. Heat is also called

46. In central heating systems, to carry thermal energy through pipes from the boiler to radiators we use

47. Thermal conductivity of air is

48. The quantity of thermal energy absorbed by a body for 1 kelvin increase in its temperature is known as

49. The energy that is transferred from one body to the other in thermal contact with each other as a result of the difference of temperature between them is called

50. In liquid glass thermometer when bulb comes in contact with a hot object, the liquid inside it