Question 11 Mark................ causes wear and tear of moving parts of the machine.AnswerFriction causes wear and tear of moving parts of the machine.View full question & answer→
Question 21 MarkLubricants are used to .....................friction.AnswerLubricants are used toreducefriction.View full question & answer→
Question 31 MarkFriction .......................the motion.AnswerFrictionopposesthe motion.View full question & answer→
Question 41 MarkWe use ball bearings to .................. the friction.AnswerWe use ball bearings toreducethe friction.View full question & answer→
Question 51 MarkOn applying brakes on a moving car, its speed .........................AnswerOn applying brakes on a moving car, its speedslows down.View full question & answer→
Question 61 MarkA moving football when kicked, its .................. changes.AnswerA moving football when kicked, itsdirection of motionchanges.View full question & answer→
Question 71 MarkOn pulling a string, its ..................increases.AnswerOn pulling a string, itslengthincreases.View full question & answer→
Question 81 MarkOn squeezing a gum tube, its ............. changes.AnswerOn squeezing a gum tube, its shapechanges.View full question & answer→
Question 91 MarkForce is applied as ........... or ..........AnswerForce is applied as pushorpull.View full question & answer→
Question 101 MarkThe force acting on a mango falling from a tree is an example of .....................AnswerThe force acting on a mango falling from a tree is an example of gravitational force.View full question & answer→
Question 111 MarkMagnetic force is a ................force.AnswerMagnetic force is anon-contactforce.View full question & answer→
Question 121 Mark.................... is the SI unit of force.AnswerNewton is the SI unit of force.View full question & answer→
Question 131 MarkBicycles use ...................... to reduce friction between the pedals and the crankAnswerBicycles useball bearingsto reduce friction between the pedals and the crank.View full question & answer→
Question 141 MarkFriction is a type of .................AnswerFriction is a type ofcontact force.View full question & answer→
Question 151 MarkFriction depends upon the ...............of an object.AnswerFriction depends upon theweightof an object.View full question & answer→
Question 161 MarkSmoother the surface, ................. is the frictional force offered by it.AnswerSmoother the surface,lesseris the frictional force offered by it.View full question & answer→
Question 171 MarkRolling friction is ...........than sliding friction.AnswerRolling friction islessthan sliding friction.View full question & answer→
Question 181 MarkSliding friction and rolling friction are types of..................friction.AnswerSliding friction and rolling friction are types ofkineticfriction.View full question & answer→
Question 191 MarkWeight remaining the same, friction is independent of .............of surface in contact.AnswerWeight remaining the same, friction is independent ofareaof surface in contact.View full question & answer→
Question 201 MarkThe force of friction acting between two bodies in contact while at rest is known as ................ friction.AnswerThe force of friction acting between two bodies in contact while at rest is known asstaticfriction.View full question & answer→
Question 211 MarkRolling friction offers .............resistance than sliding friction.AnswerRolling friction offers lessresistance than sliding friction.View full question & answer→
Question 221 MarkMore the roughness of a surface, greater is the ........................AnswerMore the roughness of a surface, greater is the friction.View full question & answer→