Preguntas Teóricas y Prácticas de Choques o Colisiones 2021-I

 

WEC]GZTCNBN XGZWBEB AFT BENGT GDWGAB XZFMGTCFEBA NG CE@GECGZËB CENWT^ZCBA

DLFRWGT F DFACTCFEGT. ^CXFT S BXACDBDCFEGT 

MËTCDB C K`. IFTÃ FAC]GZB GTXCEFYB

 

WEC]GZTCNBN XGZWBEB AFT BENGT GDWGAB XZFMGTCFEBA NG CE@GECGZËB CENWT^ZCBA

XZG@WE^BT ^GÔZCDBT Cencdbdcfegs9 Ge abs prg`uetbs qug sg cencdbe b dfetceubdcôe, sgagddcfeg ab rgspugstb dfrrgdtb y aug`f iustcmcqug su rgspugstb.

2.  Dfe rgspgdtf b ab dbetcnbn ng kfvckcgetf. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe9 (

) Gs ueb kb`ectun vgdtfrcba

(

) Gs ueb dbetcnbn gsdbabr

(

) Tc ab rbpcngz gs dgrf ab dbetcnbn ng kfvckcgetf gs dgrf

B)  ] ] ]

J) ] ] M

D) M M ]

N) ] M M

G) ] M ]

:.  Dfe rgspgdtf ba ckpuasf. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe. (

) Gs ueb dbetcnbn vgdtfrcba

( (

) Tu uecnbn ge ga T.C. gs o`.k ) Gs ueb dbetcnbn gsdbabr

B)  M ] ]

J) ] M M

D) ] ] ]

N) M M M

G) ] ] M

4.  Dfe rgabdcôe b ab dbetcnbn ng kfvckcgetf. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe. (

) ^bkjcãe sg ag aabkb kfkgetuk acegba

(

) Tg dfesgrvb dubenf ab mugrzb rgsuatbetg sfjrg ga ga sscstgkb cstgkb gs dgrf

(

) Gs af kcskf qug ga ckpuasf

B)  ] ] M

J) ] ] ]

D) M M M

N) ] M M

G) M M ]

>.  Dfe rgspgdtf b dlfqugs y dfacscfegs. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe. (

) Gs gaâstcdf gaâstcdf dubenf ga dfgmcdcgetg ng rgstctudcôe gs uef ( g ; 2)

(

) Gs paâstcdf f tftbakgetg cegaâstcdf dubenf g ; 8

(

) Xugng sgr mrfetba

B)  ] ] ]

J) M M M

MËTCDB C K`. IFTÃ FAC]GZB GTXCEFYB

D) ] ] M

N) M M ]

G) M ] M

 

WEC]GZTCNBN XGZWBEB AFT BENGT GDWGAB XZFMGTCFEBA NG CE@GECGZËB CENWT^ZCBA

7.  Dfe rgabdcôe b ab dfesgrvbdcôe nga kfvckcgetf. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe. (

) Gs ueb dfesgdugedcb ng ab tgrdgrb Agy ng Egwtfe

(

) Gs ue dbsf gspgdcba ng ab sg`uenb Agy ng Egwtfe

(

) Tôaf sg dukpag ge afs sôacnfs

B)  M ] M

J) M ] ]

D) M M M

N) ] M M

G) ] ] ]

=.  Dubenf ue dugrpf dbg acjrgkgetg. C. 

Ab dbetcnbn ng kfvckcgetf pgrkbegdg dfestbetg

CC. 

Ab mugrzb gxtgreb sfjrg ga dugrpf gs ncmgrgetg ng dgrf

CCC. 

Ab dbetcnbn ng kfvckcgetf bukgetb dfe ga tcgkpf

Aug`f pfngkfs bmcrkbr qug gs dfrrgdtb ab prfpfscdcôe B)  C

J) CC

D) C y CC

N) CC y CCC

G) C y CCC

0.  Dfe rgspgdtf ba ckpuasf. Cencqug ueb ( ] ) sc gs vgrnbngrb y ueb ( M ) sc gs mbasb ab prfpfscdcôe. ( (

) B kbyfr ckpuasf ckpuasf kbyfr dbkjcf ge ga kfkgetuk ) Gs af kcskf qug ab mugrzb ng ckpbdtf

(

) Ga ckpuasf bukgetb dubenf ab mugrzb mugrzb bdtùb ge ue cetgrvbaf ng tcgkpf abr`f

B)  ] ] ]

J) ] M ]

D) ] M M

N) M M ]

G) M M M

k/s, sg kugvg lbdcb ab ng ngrgdlb, rgdlb, dlfdb dfetrb ue dugrpf ng 4 o` ng kbsb y vgafdcnbn = k/s y sg kugvg lbdcb ab czqucgrnb. Ngspuãs nga dlfqug bkjfs dugrpfs sg kugvge iue tfs. Lbaabr ab pãrncnb ng geg gegr`ëb r`ëb dceãtcdb. Ztb. ∍ ; √08  

:. We jafqug ng kb kbsb sb 2 o` dfe ue b vgafdc nbn ng 7 k/s dlfdb dfe ftr f jafq ug ng kb kbsb sb 4 o` y vgafd cnbn > k/s g ge e sgetcn f fpu gstf. L Lbaabr baabr abs vgafdcnbngs ng afs nfs jafqugs ngspuãs nga dlfqug, ge afs sc`ucgetgs dbsfs b) Dfacsc ôe pgrmgdtb gaâstcdb j) Dfacsc ôe pgrmgdtbkgetg cegaâstc db.

Zgspugstb9 b)  Dlfqug gaâstcdf   ; ,7 ,7< <  

>. We dbkcôe ng kb kbsb sb 7 vgdgs ab kbsb ng ue butf, dlfdb dubenf vbe g ge e ncrgddcfegs ncr gddcfegs f pugstbs, ga butf vb b ueb vgafdcnbn ng 78 k/s k/s ga dbkcô e b

J) >8

MËTCDB C K`. IFTÃ FAC]GZB GTXCEFYB

D) =<

N) 4>

G) :8