FISICA GENERAL
TRABAJO COLABORATIVO UNIDAD 1
FREDY NAVARRO JAIMES Código: 88.033.8
INGENIERIA INDUSTRIAL
G!"#o: 10013$3%&
'!()(*+,do ,: -ILLIAM MAURICIO SAEN I*g(*i(!o
UNIVERSIDAD UNIVERSID AD NACIONAL ABIERTA Y A DISTANCIA ESCUELA DE CIENCIAS B/SICAS TECNOLOGA E INGENIERA 'ROGRAMA: INGENIERA INDUSTRIAL CEAD 2 ACACIAS SE'TIEMBRE 401%
DESARROLLO DE LA ACTIVIDAD Problemas seleccionados: Ejercicio N°2:
U*, i5#o!+,*+( 6o5#,7, ,"+o5o+!i9 5"()+!, "* 5od( d( )" #!i5(! ,"+o5ó;i <(6g d(
D(*)id,d d( iog!,5o) , g!,5o) 1 g K 1000g!) 9.35
Kg ∗1000 grs =9350 grs 1 Kg
C,6",5o) ( ;o"5(* d( 5od( "( )( ;, , *(6()i+,!: M,), K d(*)id,d H ;o"5(* D()#(@,5o) , ó!5", #,!, <,,! ( ;o"5(* Vo"5(* K M,), H d(*)id,d Vo"5(* K =3%0g!) H 8 gH65 K 1188 65 T(*i(*do ( ;o"5(* d( 5od( 6,6",5o) , 5,), d( o!o 6o* , )ig"i(*+( o!5",: M,), K d(*)id,d ;o"5(* M,), K 1=34 gH65 1188 65 K 44=%4 1& g!) S( 6,*6(,* o) 65 *o) o?+(*(5o) , 5,), (* g!,5o) Co*;(!+i5o) ,) "*id,d() d( g!,5o) , >iog!,5o) M,),: 44=%41& g!) 22952,16
grs∗1 Kg =22,95 Kg 1000 grs
L, 5,), d( o!o "( *(6()i+,5o) #,!, <,6(! ( *"(;o 5od(o () d(: 22! "#
%$ Ejercicio N°&&:
U* ,;ió* @(+ )( ,#!oi5, #,!, ,+(!!i9,! 6o* "*, !,#id(9 d( 100 5H) "*, ,6((!,6ió* 6o* "*, 5,g*i+"d 5i5, d( %.00 5H)P 6o*o!5( (g, , !(#o)o. ,Q D()d( ( i*)+,*+( 6",*do ( ,;ió* +o6, , #i)+, 6" () ( i*+(!;,o d( +i(5#o 5*i5o *(6(),!io ,*+() d( "( (g"( , !(#o)o ?Q E)+( ,;ió* #"(d( ,+(!!i9,! (* ( ,(!o#"(!+o d( "*, #("(7, i), +!o#i6, do*d( , #i)+, 5id( 0.800 >5 d( ,!go E#i"( )" !()#"()+,. So"6ió*: V(o6id,d i*i6i, K 100 5H) V(o6id,d i*, !(#o)oQK 0 5H) Co5o ( ,;ió* 6o5i(*9, , d(+(*(!)( , ,6((!,6ió* +o5,!, "* ;,o! *(g,+i;o A6((!,6ió*: 2%.00 5H)P 'ormulas:
Ti(5#o: V(o6id,d i*,2 ;(o6id,d i*i6i,Q H ,6((!,6ió* Di)+,*6i,: V(o6id,d i*i6i, +i(5#o ,6((!,6ió* +i(5#oP Vf =Vo – at
VoK 100 5H)
VK0 Vo= at t =Vo / a
Tiempo=
100 m/ s 5.00 m / s ²
+K K =20 s
S,?(5o) "( , #i)+, +i(*( 0.80 5 d( ,!go #o! o +,*+o () *(6(),!io <,,! , di)+,*6i, *(6(),!i, #,!, "( ( ,;ió* #"(d, ,+(!!i9,!. X = X =
X =
Vo −Vf 2
Vo 2
∗t
∗t
100 m / s 2
∗20 s =1000 m
E ,;ió* *(6()i+, 1000 5+) #,!, ,+(!!i9,! , #i)+, )oo +i(*( 800 5+) #o! o +,*+o *o #"(d( ,+(!!i9,!.
Ejercicio N°&(:
L,) 6oo!d(*,d,) #o,!() d( "* #"*+o )o* ! K .40 5 K 410. C"() )o* ,) 6oo!d(*,d,) 6,!+()i,*,) d( ()+( #"*+o So"6ió*: K ! 6o) Q YK ! )i* Q T(*i(*do 6o5o #"*+o d( i*i6io ,) ,*+(!io!() o!5",) #!o6(d(5o) , !(,i9,! , ?W)"(d, d( 6,d, "*, d( ,) 6oo!d(*,d,) !K .40 5 K410 X6o) 410KH!KH.40 K.40 6o) 410 K .40 20.8&&QK23.&3 5+) )* +(,-(.
L"(go <,,5o) X)(* 410K H!KH.40 YK.40 )(*410 YK .40 20.%QK 24.1 5+) /* +2,&
L,) 6oo!d(*,d,) 6,!+()i,*,) )o*: 0+(,-(.1 +2,&
Ejercicio N° 23:
U* +!(* !(*, 5i(*+!,) (*+!, , "*, 6"!;, 5H< , %0.0 >5H< (* o) 1%.0 ) "( +,!d, (* 6"?!i! , 6"!;,. E !,dio d( , 6"!;, () d( 1%0 5. C,6"( , ,6((!,6ió* (* ( 5o5(*+o (* "( , !,#id(9 d( +!(* ,6,*9, %0.0 >5H<. S"#o*g, "( 6o*+i*W, !(*,*do , ()+( +i(5#o 6o* , 5i)5, !(,6ió*. aT Vg=90km/h
T=15s
TREN
ax
150 m
=0 >5H< K 4%5H) %0 >5H< K 13.= 5H) aT =
Vf −Vg =¿ t
aT =
Vg−Vf =¿ t
aT =
25 m / s −13.9 m / s
Acp =
15 s
( 13.9 m / s )2 150 m
= 0,74 m / s ²
=1.29 m / s ²
L, ,6((!,6ió* )(!: A = √ a t + Ac p 2
2
Vf=50km/h
=¿
A = √ ( 0.74 m / s ² ) ² + ( 1.29 m / s ² ) =1.49 m / s ² 2
Aceleracin: &,4" m5s6
a=?
