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备考2014年全国高中物理竞赛---MarkingScheme


MARKING SCHEME FOR ANSWERS TO THE THEORETICAL QUESTION I
Part
I.a. MARKING SCHEME - THE THEORETICAL QUESTION I- JUMPING PARTICLE For: the distance

Total

Scores
2.00 points

D covered by the particle to the stop
1.00 p

?W ?x 0 ? ? D ? Ff ? ?U ?x 0 ? ? Ec ? D ? Ff ?F ? x ? E ? D ?F c f ? x 0
D? Fx ? x 0 ? Ec Ff

0.50 p 0.50 p 2.00 points

final result D ? 20 m I.b. For:

U ?x ? ? Fx ? x

1.00 p

1.00 p I.c. For : the evolution of the square of the speed as function of the position 4.00 points

1.00 p the evolution of the speed as function of the position

1.00 p or the evolution of the square of the speed as function of the position

the evolution of the speed as function of the position

1.00 p

.
1.00 p

Total score - theoretical question I

8.00 points

Professor Delia DAVIDESCU, National Department of Evaluation and Examination–Ministry of Education and Research- Bucharest, Romania Professor Adrian S.DAFINEI,PhD, Faculty of Physics – University of Bucharest, Romania



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