This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Science > Force And Pressure > Class 8 Science Chapter 11 Force And Pressure – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 11 Force And Pressure Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following force is utilised in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories? A) Electrostatic Force. B) Magnetic Force. C) Gravitational force. D) Frictional Force. Show Answer Correct Answer: A) Electrostatic Force. 2. A force may change the direction of motion of an object. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. Army tank tracks are useful for travelling through the mud because ..... A) They decrease the pressure the vehicle exerts on the ground. B) They increase the force the vehicle exerts on the ground. C) They increase the pressure the vehicle exerts on theground. D) They decrease the force the vehicle exerts on the ground. Show Answer Correct Answer: A) They decrease the pressure the vehicle exerts on the ground. 4. THE FORCE WHICH ACTS ONLY WHEN OBJECTS ARE IN PHYSICAL CONTACT WITH EACH OTHER IS CALLED AS A) BALANCED FORCE. B) THRUST. C) FORCE. D) FRICTIONAL FORCE. Show Answer Correct Answer: A) BALANCED FORCE. 5. How do you Calculate Pressure A) Force(N)/Area(m$^{2}$). B) Force(kg)/Area(mi$^{2}$). C) Area(m$^{2}$)/Force(N). D) None of the above. Show Answer Correct Answer: A) Force(N)/Area(m$^{2}$). 6. A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench? A) 1.5 Nm. B) 750 Nm. C) 7.5 Nm. D) 150 Nm. Show Answer Correct Answer: C) 7.5 Nm. 7. THE PERPENDICULAR FORCE (THRUST) ACTING PER UNIT AREA OF THE SURFACE A) PRESSURE. B) MUSCULAR FORCE. C) THRUST. D) FRICTIONAL FORCE. Show Answer Correct Answer: A) PRESSURE. 8. Convert 10 kg to Newtons A) 100 N. B) 4.5 N. C) 98 N. D) 0.098 N. Show Answer Correct Answer: A) 100 N. 9. The SI unit of force is ..... A) Dyne. B) Joule. C) Newton. D) None of the above. Show Answer Correct Answer: C) Newton. 10. Pressure is measured in what units A) Moles. B) M/s. C) Newtons. D) Pascals. Show Answer Correct Answer: D) Pascals. 11. FORCE BETWEEN TWO SURFACES IN CONTACT; IT (USUALLY) ACTS OPPOSITE TO THE DIRECTION OF MOTION IS CALLED AS A) THRUST. B) FRICTIONAL FORCE. C) PRESSURE. D) GRAVITATIONAL FORCE. Show Answer Correct Answer: B) FRICTIONAL FORCE. 12. The unit Pascal was named after the french physicist: A) Blaise Pascal. B) Louis Pascal. C) Isaac Pascal. D) All the options are incorrect. Show Answer Correct Answer: A) Blaise Pascal. 13. The SI unit of Pressure is ..... A) N / m$^{3}$. B) N / m$^{2}$. C) Kg / m$^{3}$. D) Pa / m$^{2}$. Show Answer Correct Answer: B) N / m$^{2}$. 14. Push or pull to any object is termed as A) Energy. B) Pressure. C) Heat. D) Force. Show Answer Correct Answer: D) Force. 15. What is the unit of pressure? A) Pascal. B) N/m2. C) Newton. D) Both option 1 and 2. Show Answer Correct Answer: D) Both option 1 and 2. 16. Forces acting in the same direction on an object gets A) Diminished. B) Divided. C) Added. D) Subtracted. Show Answer Correct Answer: C) Added. 17. Which force/ forces acts while holding a bucket of water A) Magnetic force. B) Muscular force. C) Gravitational force. D) Both b and c. Show Answer Correct Answer: D) Both b and c. 18. When the first experiment on barometer was conducted, what was the length of the water column and mercury column? A) Water:10.3 m, Mercury:76cm. B) Mercury:59m, Water; 7m. C) Water:67m, Mercury:72 cm. D) None of the above. Show Answer Correct Answer: A) Water:10.3 m, Mercury:76cm. 19. Force per unit area is called A) Dencity. B) Temperature. C) Atmosphere. D) Pressure. Show Answer Correct Answer: D) Pressure. 20. When forces are going in the opposite direction of each other you should do what do find the net force A) Divide. B) Multiply. C) Add. D) Subtract. Show Answer Correct Answer: D) Subtract. 21. If two forces act in opposite direction, the net force is the addition between two forces. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Force acts on an object may change A) Direction. B) Shape. C) Speed. D) All of the above. Show Answer Correct Answer: D) All of the above. 23. The force exerted by the atmosphere per unit area of the surface of the earth is called atmospheric pressure. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. What is the unit of measurement for pressure? A) Pascal. B) Meters. C) Milliters. D) Grams. Show Answer Correct Answer: A) Pascal. 25. Earth complete its one revolution around sun in ..... A) 365 days. B) 24 days. C) 334 days. D) 27 days. Show Answer Correct Answer: A) 365 days. 26. A car moving at a speed of 72km/h slows down to a speed of 18km/h in 5 seconds. Calculate the force applied by the brakes to slow the car down if the mass of the car is 3000kg. A) On. B) -600N. C) -9000N. D) -3000N. Show Answer Correct Answer: C) -9000N. 27. When two forces act in opposite directions, then net force acting is the- A) Sum of two forces. B) Difference between the two forces. C) Both of these. D) None of these. Show Answer Correct Answer: B) Difference between the two forces. 28. Which of these are not contact forces A) Gravitational Force. B) Frictional Force. C) Muscular Force. D) Mechanical Force. Show Answer Correct Answer: A) Gravitational Force. 29. Force is a ..... quantity and is measured using a ..... A) Vector, Barometer. B) Vector, spring balance. C) Vector, Manometer. D) None of the above. Show Answer Correct Answer: B) Vector, spring balance. 30. The force exerted by a magnet on a piece of iron is also a contact force A) None of these. B) True. C) False. D) None of the above. Show Answer Correct Answer: C) False. 31. A device used to measure the pressure exerted by a liquid is A) Barometer. B) Lactometer. C) Hydrometer. D) Manometer. Show Answer Correct Answer: D) Manometer. 32. Example of Magnetic Material A) Cobalt. B) Steel. C) Nickel. D) All of The Above. Show Answer Correct Answer: D) All of The Above. 33. There is one force which is exerted by all matter on all other matter.which force is this A) Electrostatic force. B) Magnetic force. C) Frictional force. D) Gravitational force. Show Answer Correct Answer: D) Gravitational force. 34. Why to deep sea drivers wear special suites? A) To look attractive. B) To protect from large liquid pressure. C) To protect from low pressure in oceans. D) None of the above. Show Answer Correct Answer: B) To protect from large liquid pressure. 35. How can we increase the gas pressure inside a sealed container? A) Increase the number of particles inside the container. B) Increase the temperature. C) Decrease the volume of the container. D) All of these. Show Answer Correct Answer: D) All of these. 36. Which one among the following is not a type of non-contact forces? A) Magnetic force. B) Electrostatic force. C) Muscular force. D) Gravitational force. Show Answer Correct Answer: C) Muscular force. 37. Speed of the body is defined as the distance travelled by the body in one second A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 38. What happens to the speed of an object if the applied force acts in the direction opposite to the direction of motion of an object A) Decreases. B) Increases. C) Remains same. D) All may be true. Show Answer Correct Answer: A) Decreases. 39. The pressure exerted by a fluid on the sides of its vessel is called ..... pressure A) Lateral. B) Upward. C) Downward. D) Vertical. Show Answer Correct Answer: A) Lateral. 40. The SI unit of pressure is Pascal, is also denoted by: A) M$^{2}$/N. B) N/m$^{2}$. C) N/m. D) None of these. Show Answer Correct Answer: B) N/m$^{2}$. 41. Why is the atmospheric pressure at a higher altitude lower? A) The layer of air is thin. B) Temperature is high. C) The volume of air does not change. D) Density of air is high. Show Answer Correct Answer: A) The layer of air is thin. 42. Train come to railway station and try to stop, show ..... motion A) Uniform. B) Non uniform. C) Oscillatory. D) None of the above. Show Answer Correct Answer: B) Non uniform. 43. Motion of an object in a straight line is called ..... A) Curvilinear. B) Rectilinear. C) Random. D) None of the above. Show Answer Correct Answer: B) Rectilinear. 44. Pressure is directly proportional to A) Mass. B) Area. C) Volume. D) Force. Show Answer Correct Answer: D) Force. 45. What is the value of atmospheric pressure at sea level? A) 76 mm column of mercury. B) 76 cm column of mercury. C) 760 mm column of mercury. D) Both B) and C). Show Answer Correct Answer: D) Both B) and C). 46. What does Hooke's law of elasticity state? A) Within the elasticity limit, stress is directly proportional to strain. B) Within the stress limit, strain is directly proportional to elastic. C) Within the elasticity limit, stress is inversely proportional to strain. D) None of these. Show Answer Correct Answer: A) Within the elasticity limit, stress is directly proportional to strain. 47. Which of the following produces least friction? A) Rolling Friction. B) Sliding Friction. C) Static Friction. D) None of the above. Show Answer Correct Answer: A) Rolling Friction. 48. A book is kept on horizontal table. How many forces are acting on it? A) 1. B) 3. C) 2. D) 0. Show Answer Correct Answer: C) 2. 49. Relative density has no unit because ..... A) It's a rato. B) It's a ratio of two simillar quantities. C) It's an inherent properity of substance. D) It's a number. Show Answer Correct Answer: B) It's a ratio of two simillar quantities. 50. What is the unit to MEASURE force? A) Meter. B) Newton. C) Pounds. D) Kilogram. Show Answer Correct Answer: B) Newton. 51. When force is applied on a rigid body A) Shape of the body changes. B) Size of the body changes. C) The body changes its state of motion. D) None of these. Show Answer Correct Answer: C) The body changes its state of motion. 52. Why is a barometer used to determine the atmospheric pressure of an area? A) As humans do not have the capability to measure. B) To get accurate readings. C) As it is same everywhere. D) As it is a non constant quantity. Show Answer Correct Answer: D) As it is a non constant quantity. 53. State of motion is described by A) Position of rest. B) Position of motion. C) Both by the state of rest or motion. D) None of these. Show Answer Correct Answer: C) Both by the state of rest or motion. 54. A body is said to be under balanced forces when the resultant force applied on that body is ..... A) One. B) Zero. C) Infinite. D) None of these. Show Answer Correct Answer: B) Zero. 55. We know that force can change some properties of objects. Which of the following properties does force NOT change? A) Colour. B) Speed. C) Shape. D) Direction. Show Answer Correct Answer: A) Colour. 56. Sea divers wear special protective suits to A) Protect themselves from dangerous sea creatures. B) Camouflage themselves. C) Protect themselves from the pressure exerted by the sea. D) None of the above. Show Answer Correct Answer: C) Protect themselves from the pressure exerted by the sea. 57. Muscular force is also called A) Gravitational force. B) Contact force. C) Magnetic force. D) Non contact force. Show Answer Correct Answer: B) Contact force. 58. The further the force is from the pivot, the greater its turning effect. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. A porter carrying a heavy luggage on his head always keep a round wrap of cloth on his head. why? A) It decreases the weight of luggage. B) To protect from injury. C) It decreases the area of contact between is head and luggage. D) To show to other people. Show Answer Correct Answer: C) It decreases the area of contact between is head and luggage. 60. If the horse reared up on 2 legs what effect would it have on the pressure? A) It will exert four times the pressure it did before. B) It will exert twice the pressure it did before. C) It will exert half the pressure it did before. D) It will exert the same pressure it did before. Show Answer Correct Answer: B) It will exert twice the pressure it did before. ← PreviousNext →Related QuizzesScience QuizzesClass 8 QuizzesClass 8 Science Chapter 11 Force And Pressure Quiz 1Class 8 Science Chapter 11 Force And Pressure Quiz 2Class 8 Science Chapter 11 Force And Pressure Quiz 4Class 8 Science Chapter 11 Force And Pressure Quiz 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books