Pinky Public SchoolName:manoj kumar.rGrade: VIII, Sec:cPhysical Science - Worksheet-2Lesson 12. Friction1. Why liquids and gases are called as fluid?2. Fill in the blanks: A car with worn out treads on tyres is more likely to skiddue to3. Choose the correct option: Friction, that exists between two surfaces incontact, when there is no relative motion between them, is calleda) Static frictionb) Rolling frictionc) Sliding frictiond) None of these4. State True or False: Sliding friction is greater than static friction.a) trueb) false5. State True or False: We can easily walk on frictionless surface.a) trueb) false6. Choose the correct option: Interlocking of irregularities on two surface incontact causea) Temperature b) Frictionc) Pressured) Motion7. Fill in the blanks: Sprinkling of powder on carom boardfriction8. State True or False: Friction opposes relative motion between the surfacesof the book and the table.a) trueb) false9. Least amount of friction is required in which of the following sports?a) Cricket b) Footballc) Hockey d) Ice skating10. State True or False: The brakes slow down or stop moving bicycle due tofriction.a) trueb) false11. What is streamlined?12. State True or False: It is easier to push than pull.a) trueb) false13. Which of the following surface will offer the least frictional force?a) Dry marble floorb) Wet marble floorc) Sand floord) Grass floor14. Which surface has the least amount of friction?a) iceb) grassc) sand d) None of these15. State True or False: Smooth surface has more irregularities than roughsurface.a) trueb) false

Pinky Public SchoolName:manoj kumar.rGrade: VIII, Sec:cPhysical Scienc

1.	Pinky Public SchoolName:manoj kumar.rGrade: VIII, Sec:cPhysical Science - Worksheet-2Lesson 12. Friction1. Why liquids and gases are called as fluid?2. Fill in the blanks: A car with worn out treads on tyres is more likely to skiddue to3. Choose the correct option: Friction, that exists between two surfaces incontact, when there is no relative motion between them, is calleda) Static frictionb) Rolling frictionc) Sliding frictiond) None of these4. State True or False: Sliding friction is greater than static friction.a) trueb) false5. State True or False: We can easily walk on frictionless surface.a) trueb) false6. Choose the correct option: Interlocking of irregularities on two surface incontact causea) Temperature b) Frictionc) Pressured) Motion7. Fill in the blanks: Sprinkling of powder on carom boardfriction8. State True or False: Friction opposes relative motion between the surfacesof the book and the table.a) trueb) false9. Least amount of friction is required in which of the following sports?a) Cricket b) Footballc) Hockey d) Ice skating10. State True or False: The brakes slow down or stop moving bicycle due tofriction.a) trueb) false11. What is streamlined?12. State True or False: It is easier to push than pull.a) trueb) false13. Which of the following surface will offer the least frictional force?a) Dry marble floorb) Wet marble floorc) Sand floord) Grass floor14. Which surface has the least amount of friction?a) iceb) grassc) sand d) None of these15. State True or False: Smooth surface has more irregularities than roughsurface.a) trueb) false
Answer» 1st answer because MOLECULES are very far in LIQUID s and GASES

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