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1. How does air resistance act as a contact force? A. Air resistance only affects objects that are stationary in the air. B. Air resistance is a gravitational force that pulls objects downwards. C. Air resistance increases the speed of an object moving through the air. D. Air resistance acts as a contact force by opposing the motion of an object through

2. What is the role of electric force in everyday life? A. Electric force is primarily used for heating water. B. Electric force has no impact on biological systems. C. Electric force is only relevant in scientific experiments. D. Electric force is essential for the operation of electronic devices, electricity flow, and biological processes.

3. How do you measure force using a spring scale? A. You measure force by calculating the mass of the object only. B. You measure force by observing the color change of the spring scale. C. You measure force by using a ruler to determine the length of the spring. D. You measure force by attaching an object to the spring scale and reading the measurement indicated on the scale.

4. What happens to the spring in a spring scale when a force is applied? A. The spring only reacts to forces applied in one direction. B. The spring breaks immediately upon any force application C. The spring remains unchanged regardless of the force applied. D. The spring deforms (compresses or stretches) in response to the applied force.

5. Which of the following is an example of unbalanced forces? A. Two people pushing a car in the same direction. B. A person holding a stationary object without any force applied. C. A person pushing a car on a flat surface without any resistance. D. A person pushing a car while another person pulls it in the opposite direction.

6. Which of the following is an example of unbalanced forces? A. Two people pushing a car in the same direction. B. A person holding a stationary object without any force applied. C. A person pushing a car on a flat surface without any resistance. D. A person pushing a car while another person pulls it in the opposite direction.

7. . What happens to an object when unbalanced forces act on it? A. The object remains at rest. B. The object moves in a circular path. C. The object experiences no change in motion. D. The object accelerates in the direction of the net force.

8. I n you name a real-life situation where balanced forces are present? A. A book resting on a table. B. A balloon floating in the air. C. A car accelerating on a highway. D. A person pushing a heavy box without moving it.

9. What occurs when the net force on an object is not zero? A. The object will remain at rest. B. The object will move in a circular path. C. The object will decelerate regardless of the force. D. The object will accelerate in the direction of the net force.

10. Can you describe a scenario where unbalanced forces cause acceleration? A. A bicycle moving at a constant speed on a flat road. B. A ball rolling down a hill due to gravity acting alone. C. A person pushing a heavy box without any movement occurring. D. A car accelerating forward due to the engine's force being greater than friction.

11. How do you represent gravity in a free body diagram? A. Gravity is shown as a horizontal line labeled 'g'. B. Gravity is depicted as a dotted line with no label. C. Gravity is represented as an upward arrow labeled 'mg'. D. Gravity is represented as a downward arrow labeled 'mg'

12. When drawing a free body diagram, what should you include? A. Only include the object without any forces. B. Include only the gravitational force acting on the object C. Draw only the direction of the forces, not their magnitudes. D. Include all forces acting on the object, their directions, and the object itself.

13. How do unbalanced forces affect motion? A. Unbalanced forces cause an object to accelerate, changing its motion. B. Unbalanced forces have no effect on an object's direction. C. Unbalanced forces only affect the speed of an object. D. Unbalanced forces keep an object at rest.

14. Can unbalanced forces cause an object to change direction? A. Unbalanced forces cannot affect an object's motion. B. Only balanced forces can change an object's direction. C. Yes, unbalanced forces can cause an object to change direction. D. An object can only change direction with no forces acting on it.

15. Describe a situation where unbalanced forces are at play. A. A game of tug-of-war where one team pulls harder than the other. B. A car accelerating on a flat road without any resistance. C. A ball rolling down a smooth hill with no friction. D. A person standing still on a level surface.

16. Describe a situation where unbalanced forces are at play. A. A game of tug-of-war where one team pulls harder than the other. B. A car accelerating on a flat road without any resistance. C. A ball rolling down a smooth hill with no friction. D. A person standing still on a level surface.

17. How can unbalanced forces be observed in a game of soccer? A. Unbalanced forces can be seen when a player kicks the ball, changing its direction and speed. B. Unbalanced forces do not affect the players' movements. C. Unbalanced forces only apply when the ball is stationary. D. Unbalanced forces are not relevant in soccer.

18. What is the difference between distance and displacement? A. Distance measures total movement, while displacement measures the shortest path between two points. B. Displacement measures total movement, while distance measures the shortest path. C. Distance and displacement are the same concept. D. Distance is always greater than displacement.

19. If a car travels 100 meters north and then 100 meters south, what is the displacement? A. 0 meters B. 200 meters C. 100 meters, North D. 100 meters, South

20. What role does a reference point play in measuring displacement? A. A reference point is used to calculate speed. B. A reference point determines the direction of motion. C. A reference point indicates the maximum distance traveled. D. A reference point defines the starting position for measuring displacement.

21. What is the formula for calculating average speed? A. Average Speed = Distance x Time B. Average Speed = Total Distance / Total Time C. Average Speed = Total Distance + Total Time D. Average Speed = Total Time / Total Distance

22. If a car travels 60 km in 1 hour, what is its speed? A. 30 km/h B. 50 km/h C. 60 km/h D. 70 km/h

23. If a person walks 3 km north and then 4 km south, what is their velocity? A. 4 km north B. 3 km north C. 1 km north D. 1 km south (displacement)

24. In a graph, what does a horizontal line indicate about speed? A. The speed is zero. B. The speed is constant. C. The speed is increasing. D. The speed is decreasing.

25. What does a steep slope on a velocity-time graph indicate? A. It indicates rapid acceleration or deceleration. B. It represents a horizontal line on the graph. C. It shows a decrease in velocity over time. D. It indicates constant speed.

26. Which of the following statements is true about temperature? A. It is a measure of the average kinetic energy of particles in a substance. B. It is a measure of the potential energy of particles in a substance. C. It is a measure of the volume of a substance. D. It is a measure of the density of a substance.

27. Heat flows from regions of _____ temperature to regions of _____ temperature. A. higher, higher B. higher, lower C. lower, higher D. lower, lower

28. What is the relationship between heat and temperature? A. Heat is energy transfer; temperature measures kinetic energy. B. Temperature is the total energy of an object. C. Heat is a measure of an object's mass. D. Heat is the same as temperature

29. How does heat transfer affect temperature? A. Heat transfer has no impact on temperature. B. Heat transfer only affects pressure, not temperature. C. Temperature remains constant regardless of heat transfer. D. Heat transfer directly affects temperature by increasing or decreasing it based on the direction of heat flow.

30. What is the unit of heat in the International System of Units (SI)? A. Celsius (°C) B. Fahrenheit (°F) C. Kelvin (K) D. Joule (J)

31. How is temperature measured? A. Temperature is measured using thermometers. B. Temperature is measured by counting seconds. C. Temperature is measured using scales. D. Temperature is measured with rulers.

32. The natural direction of heat flow between two bodies depends on __________. A. their volume B. their temperature C. their heat capacity D. whether they are in a liquid, a solid or gaseous state

33. What is conduction and how does it work? A. Conduction is the transfer of heat through direct contact between materials, primarily occurring in solids. B. Conduction is the process of generating electricity through friction. C. Conduction occurs only in gases and liquids. D. Conduction is the movement of air in liquids.

34. What is the characteristic of a good conductor? A. High thermal conductivity B. Low thermal conductivity C. Low melting point D. Low density

35. How does an insulator differ from a conductor regarding heat transfer? A. Insulators transfer heat more easily than conductors. B. Conductors reduce heat transfer, while insulators facilitate it. C. Conductors have high thermal conductivity, while insulators have low thermal conductivity. D. Insulators have high thermal conductivity, while conductors have low thermal conductivity.

36. Explain radiation as a method of heat transfer. A. Radiation requires a physical medium to transfer heat. B. Radiation only occurs in liquids and gases, not in solids. C. Radiation is the transfer of heat through conduction and convection. D. Radiation is the transfer of heat through electromagnetic waves without the need for a medium.

37. Which method of heat transfer involves direct contact between materials? A. Conduction B. Convection C. Insulation D. Radiation

38. What is the primary method of heat transfer in fluids (liquids and gases)? A. Conduction B. Convection C. Radiation D. Reflection

39. What is the main form of heat transfer from the Sun to the Earth? A. Conduction B. Convection C. Radiation D. Reflection

40. In which process does warm air rise and cool air sink, creating a circulation pattern? A. Conduction B. Convection C. Radiation D. Reflection

41. When you feel the warmth from a fire without touching it, what type of heat transfer is occurring? A. Conduction B. Convection C. Radiation D. Reflection

42. W hat type of surface is best at emitting and absorbing thermal radiation? A. Dark, matte surface B. Light, shiny surface C. Transparent surface D. Reflective surface

43. Why are cooking utensils provided with wooden handles? A. Wood is cheaper than steel. B. Wood is light and easy to handle. C. Wood is a poor conductor of heat. D. Wood makes cooking utensils more attractive.

44. How does heat travel through the pan? A. by convection B. by conduction C. by dispersion D. by radiation

45. How does heat travel through the egg? A. by convection B. by conduction C. by dispersion D. by radiation

46. Which of the following explains why the man can hold the handle of the pan with her bare hand? I. The handle is made of good insulator of heat. II. The handle has low thermal conductivity. III. The handle has high thermal expansion. A. I and II only B. II and III only C. I and III only D. I, II, and III

47. Which of the following methods of heat transfer is NOT taking place in the given situation? Conduction Convection Radiation None of them

48. Which of the following statements about radiation is true? A. It requires a medium to transfer heat. B. It can occur in a vacuum. C. It is slower than conduction D. It only occurs in solids.

49. Which of the following is best used when cooking to avoid burns? A. Mittens B. Piece of carton C. Rubber gloves D. None of the above

50. What type of heat transfer is reduced by using double-glazed windows? A. Conduction B. Convection C. Radiation D. All of the above

51. In which heat transfer method do particles themselves move from one place to another? A. Conduction B. Convection C. Radiation D. Conduction and Convection