2024河南英语中考试题汇编物理.pdfVIP

2024河南英语中考试题汇编物理

2024HenanEnglishMiddleSchoolPhysicsExamination

Compilation

1.MultipleChoiceQuestions

1.Whichofthefollowingisanexampleofabalancedforce?

A.Acarspeedinguponthehighway

B.Aboxbeingpushedacrossafrictionlesssurface

C.Abooksittingonatable

D.Anairplanetakingoff

2.WhatistheSIunitofforce?

A.Newton

B.Joule

C.Watt

D.Kilogram

3.Whichofthefollowingistrueaboutwork?

A.Workisonlydonewhentheforceisappliedinthe

oppositedirectionofthedisplacement.

B.Workistheproductofforceanddisplacement.

C.Workisascalarquantity.

D.Workisindependentoftime.

4.Whatistheformulaforcalculatingpower?

A.Power=Force/Time

B.Power=ForcexDistance

C.Power=Work/Time

D.Power=Work/Force

5.Whenanobjectisinequilibrium,whichofthefollowing

statementsistrue?

A.Theobjectismovingwithaconstantvelocity.

B.Thenetforceactingontheobjectiszero.

C.Theobjectisatrest.

D.Theobjectisaccelerating.

2.ShortAnswerQuestions

1.Explainthedifferencebetweenmassandweight.

2.Giveanexampleofanon-contactforce.

3.Whatisthelawofconservationofenergy?

5.Explainhowaleverworks.

3.ProblemSolvingQuestions

1.A5kgblockispulledwithaforceof20Nalonga

frictionlesssurface.Calculatetheaccelerationoftheblock.

2.A1000Wmotorliftsa200kgelevatorverticallyupwards

ataconstantspeedof2m/s.Calculatetheefficiencyofthe

motor.

3.Acarwithamassof1500kgismovingataspeedof20

m/s.Calculateitskineticenergy.

4.Aspringwithaforceconstantof200N/miscompressed

by0.1m.Calculatethepotentialenergystoredinthespring.

5.A