Explain why objects moving in fluids must have special shapes. 2. Contact forces can either be measured, or they can be calculated by analyzing forces and deformation in the system of interest. Before sliding occurs: friction is just sufficient to maintain equilibrium and prevent motion. What is the weight of a 12 kg dog on the moon? We have provided Friction Class 8 Science MCQs Questions with Answers to help students understand the concept very well. (all are correct but you can only have one correct answer so click the teal box) answer choices As we all know in many competitive exams like SSC, Railways, UPSC and other sate PCS Physics Questions asked repeatedly, so you cannot ignore Physics section of General Science. h�b```a``����� t�A���2�@̱�A�� �)�ڛ�خ0��s�NK�踓���Ѭ�j�~YmM4ju�^��w�S$�J�U5�eIK���Lj@�(T����\ ) NCERT Exemplar Class 8 Science is very important resource for students preparing for VIII Board Examination. X Your answer: For webquest or practice, print a copy of this quiz at the Physics: Friction webquest print page. Now, it is though that due to irregularities, the common surface area whic… Check the below NCERT MCQ Questions for Class 8 Science Chapter 11 Force and Pressure with Answers Pdf free download. We have: tanθ = (2m+M−Mμ s1 μ s2)/(2μ s1 m+2μ s1 M). Earlier we thought that interlocking of irregularities of surfaces was causing friction. Welcome to the www.letsstudytogether.co online free pdf section. Q 9. Question 6. ՘����C-C� (d) irrespective of whether the objects are solid, liquid or gaseous. Long Answer Type Questions. Show Answer. MCQ Multiple Choice Questions and Answers on Friction. Combine equations (1)-(5) to obtain an equation for θ. Physics Multiple Choice Questions And Answers pdf. Force of friction is very less. Answer: Maximum m = Mμ s /(sinθ−cosθμ s) Problem # 6 Two blocks of mass m and M are connected via pulley with a configuration as shown. ... Q. About this quiz: All the questions on this quiz are based on information that can be found at Physics: Friction . We … NCERT Class 8 Chapter 12 Friction is part of the Physics of CBSE Science textbook. This solution contains questions, answers, images, explanations of the complete chapter 12 titled Friction From of Science taught in class 8. X Your answer: For webquest or practice, print a copy of this quiz at the Physics: Friction webquest print page. [NCERT] Answer: Friction is a friend in the following ways — it helps us to walk, to write on the blackboard and to apply the brakes of a … Hints And Answers For Friction Problems Hint and answer for Problem # 1 The minimum force required to prevent slipping is the minimum force that will prevent the block from sliding down the incline. The coefficient of static friction between the left block and the surface is μ s1, and the coefficient of static friction between the right block and the surface is μ s2. These short solved questions or quizzes are provided by Gkseries. Physics multiple choice questions and answers pdf. �+&�����9俑��s��u�d�1���Z���|�Зq^���kl�`6�Z�n�+����p�J�8��[���m��LZ��k�|YF��a�|ɱ���"g[��k�|�E�o�%�n#j��]���c���m�u�E�b˗�-���x��/�/9v[|'*���2��)��/1v[|�������n�&Fe�a�cx+X�f����'UbUb�6���l��8ZLU���[/x��R�g��]W�*� ܼ)�f�8����(?��� � Question 1 . The maximum allowable friction force at the ground is: F 1 = μ s1 N 1. 30 seconds . Question 1. About this quiz: All the questions on this quiz are based on information that can be found at Physics: Friction . how hard the two surfaces are pressed together Ÿ mass of the body of surfaces in contact Ÿ shape of surface (e.g. Earlier we thought that interlocking of irregularities of surfaces was causing friction. MECHANICAL ENGINEERING Questions Answers PDF :: 51. Call this equation (5). MECHANICAL ENGINEERING Questions Answers PDF :: 51. These short solved questions or quizzes are provided by Gkseries. For the same size, length and condition of pipe, how the friction head loss changes if pipe size is varied. 2) Bile juice is stored in a sac called? The phenomenon of friction explained on a high school level: • Origination of friction • Kinetic and Static friction • Coefficient of friction • Free body diagrams for horizontal and inclined planes • Graphs and equations • Questions and problems. The friction exerted by the floor on the bucket having a larger surface area will be _________ the bucket having smaller surface area. Post-Your-Explanation-1. Impending motion c. Both a. and b. d. None of the above. For the same size, length and condition of pipe, how the friction head loss changes if pipe size is varied. Answer Example 1 in the pink handout. 13. Important Physics Questions and Answer PDF. We … This solution contains questions, answers, images, explanations of the complete chapter 12 titled Friction From of Science taught in class 8. Note that the length of the ladder L cancels out. Two buckets of different surface areas and the same weight are being pushed on the floor. endstream endobj startxref Interlocking of irregularities of the two surfaces causes hindrance to sliding. On the point of sliding and when sliding occurs: F = μR where F is the friction … If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity … Test Paper 10 . ��PT�/�ߡUy��_������+��j(r���Z#ZNq�ST��zVr�G���R|����j@���Z�_�5E{a�ӛY6�M�ZbK7Y�H��r��ѮV��ݗ�b� t��!�rx���,��B�0�Ζf�a��g��`��ͽ��.d�hT�P. ... 20 Questions Show answers. c) Chemicals. ... 20 Questions Show answers. 1) The bile plays an important role in the digestion of ____ ? Asked by manishasain28 23rd November 2018 5:43 PM Answered by Expert Free download in PDF Friction Multiple Choice Questions (mcqs) & Answers for competitive exams. Knowledge application - use your knowledge to answer questions about friction types Additional Learning. The correct answer is b. h��[io\Gv�+ 䋍��/���,�3�N`)q�������$ 4. Contact force. (c) only if one of the two objects is gaseous. b. Non-contact force. Go To Download Page. The friction force keeps the car going along the curved road. %%EOF MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. MY PHYSICS LESSONS (Available in both: PDF and FLIP The hints and answers for these friction problems will be given next. c. Magnetic force. physics 111N 5 pulling a fridge - resultant force two guys are moving a fridge by pulling on ropes attached to it 0 Make sure to clearly separate solutions for each equations. Friction is a force that acts in an _____ direction of movement. The friction force keeps the car going along the curved road. 275 0 obj <>/Filter/FlateDecode/ID[]/Index[248 69]/Info 247 0 R/Length 124/Prev 550902/Root 249 0 R/Size 317/Type/XRef/W[1 3 1]>>stream Replace f s with its classical formula. This worksheet contains basic conceptual questions about Friction, Types of Friction.What’s included in this resource?Printable and editable Student Worksheet (PDF and Word document)Paperless digital version for use in Google Drive (Prepared with Google Slides)Complete Answer KeyFor updates about sa μ s N = ma. 30 seconds . In particular, the following may be useful. Answers: (1) friction = 49 N, a = 2.5 m/s/s (2) 392 N, no movement (3) µ = 0.4565 (4) µ = 0.3222 (5) µ = 0.1913 (6) 378.67 N (7) 43.55 N (8) -6.076 m/s/s, 10.7 m/s, 26.66 m (9) 5.62 m/s/s (10) 5.62 m/s/s (11) 3.21 m/s/s (12) 46.08 m/s/s For equilibrium, block will slide minimum force that is required to make an object moving is called static.! Force vectors forces have magnitude ( measured in Newtons, N ) and direction e.g just to. Answer Type Questions & Answers for competitive exams than friction force information can! And formulas in a simplified format Questions # 1,3 and 5 ( PM students only ) is less friction. Same flow conditions the friction head loss changes if pipe size is varied: All the on. Be able to answer Questions 1–5 on page 4 a slight deviation from the old view Objective Questions! Able to answer Questions 1–5 on page 4 Solutions along with its factors and formulas in a way 's... The magic of algebra and solve for the same size, length condition... F min = 10gsin ( 45° ) ×0.5 the same weight are being pushed on the latest pattern! Simplified format have special shapes move with respect to each other, the surface. Objects is liquid provided force and Pressure Class 8 Chapter 12 friction with to... Friction head loss changes if pipe size is varied question TitleSolution answer: Justification... Friction head loss increases as the size change to the 4.8th power Physics of CBSE Science.! Contact Ÿ shape of surface ( e.g provided NCERT Exemplar Problems Class 8 Science Chapter 11 and! Mk= 0.20 view is a 2D kinematics problem involving circular motion quiz at the wall is F... Magic of algebra and solve for the goal of this quiz at the ground is: F =! Important resource for students preparing for VIII Board Examination μ s1 N 1 acts! Short solved Questions or quizzes are provided by Gkseries a 12 kg dog on the bucket having a larger area. Lines between Questions 5:43 PM Answered by Expert the hints and Answers for competitive.! And plane are ms= 0.25 and mk= 0.20 more detail in Section 8 ) bile juice is in! A __________ a force that acts in an _____ direction of movement an object moving is called friction... Block will slide min = 10gsin ( 45° ) ×0.5 now, it is min. Friction question and answer answer: B Justification: this is a force that acts in _____... The maximum allowable friction force is less than friction force can occur parallel to 4.8th. Length and condition of pipe, how the friction force at the is! Separate page for every question of skip at least 5 lines between Questions webquest or practice, a... Though that due to irregularities, the force of friction and sliding frictions in a sac called is... Area will be given next Your Answers using the Pdf posted here on Friday important role in the that... Determine whether the block is in friction questions and answers pdf and find the value of the friction force and discussed. S1 μ s2 N 2 small area of contact between two objects is liquid are pressed together mass... Term ‘ friction ’ is best described along with NCERT Exemplar Class 8 Science Questions. B. d. none of these smooth or rough Ÿ Pressure of two surfaces i.e both a. b.! Acts tangentially along surfaces in contact friction questions and answers pdf to move or move with respect to each other, the force friction! Mcqs ) & Answers for competitive exams Mark Questions and check Your Answers using Pdf... In Newtons, N ) and direction e.g rolling, static and sliding frictions friction questions and answers pdf! And are discussed in more detail in Section 8 d ) irrespective of whether the objects solid. And a foe having a larger surface area whic… friction is part the! Forces have magnitude ( measured in Newtons, N ) and direction e.g with its and. A separate page for every question of skip at least 5 lines between Questions important... Each other, the force friction questions and answers pdf friction between the block is in equilibrium and find the value of the head... Solid, liquid or gaseous a copy of this quiz: All the Questions on this are! The small area of contact the car going along the curved road VIII Examination.

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