I need to get caught up. I'm behind due to a family members Illness.

EN kim berly .g ib so n 3@ sn hu.e d u (sign out ) P H Y-1 01-J 2 502, F a ll 2 020 M od u le F o u r P ro b le m s & E xe rc is e s (H om ew ork ) INSTRUCTOR Mark Scheuern So u th ern N ew H am psh ir e U niv e rs it y Current Score QUESTION POINTS 1 2 3 4 5 6 7 8 9 10 TOTAL SCORE –/40 0.0 % SUN, NOV 22, 2020 11:59 PM EST Request Extension Assignment Submission & Scoring Assignment Submission For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. –/4 –/4 –/4 –/4 –/4 –/4 –/4 –/4 –/4 –/4 Due DateHom e My A ssig n m en ts Gra d es Com munic a tio n Cale n dar My e B ooks How m uch w ork d o es a s u p erm ark e t c h ecko ut a tte n d an t d o o n a c a n o f s o up h e p ush es 0 .6 50 m h o riz o nta lly w it h a f o rc e o f 4 .3 0 N ? E xp re ss y o ur a n sw er in jo ule s a n d k ilo ca lo rie s. A ddit io nal M ate ria ls R ea d in g S up po se a c a r t ra ve ls 1 08 k m a t a s p eed o f 2 5.0 m /s , a n d u se s 1 .8 0 g allo ns o f g aso lin e. O nly 3 0% o f t h e g aso lin e g o es in to u se fu l w ork b y t h e f o rc e t h at k e ep s t h e c a r m ovin g a t c o nsta n t s p eed d esp it e f ric tio n. ( T he e n erg y c o nte n t o f gaso lin e is 1 .3 ✕ 1 0 8 J p er g allo n.) ( a ) W hat is t h e f o rc e e xe rte d t o k e ep t h e c a r m ovin g a t c o nsta n t s p eed ? N (b ) I f t h e r e q uir e d f o rc e is d ir e ctly p ro po rtio nal t o s p eed , h o w m an y g allo ns w ill b e u se d t o d riv e 1 08 k m a t a s p eed o f 2 8.0 m /s ? g allo ns Addit io nal M ate ria ls R ea d in g Assignment Scoring Your best submission for each question part is used for your score. J kc a l 1. [–/4 Points ] OSCOLPHYS1 7.1.001. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 2. [–/4 Points ] OSCOLPHYS1 7.1.004. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a ) C alc u la te t h e f o rc e n eed ed t o b rin g a 9 50 k g c a r t o r e st f ro m a s p eed o f 8 0.0 k m /h in a d is ta n ce o f 1 15 m ( a f a ir ly t y p ic a l d is ta n ce f o r a n o np an ic s to p). N (b ) S up po se in ste a d t h e c a r h it s a c o ncre te a b utm en t a t f u ll s p eed a n d is b ro ug ht t o a s to p in 2 .0 0 m . C alc u la te t h e f o rc e e xe rte d o n t h e c a r a n d c o m pare it w it h t h e f o rc e f o un d in p art ( a ), i. e . ﬁ nd t h e r a tio o f t h e f o rc e in p art( b ) t o t h e f o rc e in p art( a ). (f o rc e in p art ( b ) / f o rc e in p art ( a )) A ddit io nal M ate ria ls R ea d in g A c a r's b um per is d esig ned t o w it h sta n d a 7 .2 0 -k m /h ( 2 .0 - m /s ) c o llis io n w it h a n im mova b le o bje ct w it h o ut d am ag e t o t h e b o dy o f t h e c a r. T he b um per c u sh io ns t h e s h o ck b y a b so rb in g t h e f o rc e o ve r a d is ta n ce . C alc u la te t h e m ag nit u d e o f th e a ve ra g e f o rc e o n a b um per t h at c o lla p se s 0 .1 80 m w hile b rin g in g a 8 90 -k g c a r t o r e st f ro m a n in it ia l s p eed o f 2.0 m /s . N A ddit io nal M ate ria ls R ea d in g 3. [–/4 Points ] OSCOLPHYS1 7.2.012. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 4. [–/4 Points ] OSCOLPHYS1 7.2.013. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a ) H ow m uch g ra vit a tio nal p o te n tia l e n erg y ( re la tiv e t o t h e g ro un d o n w hic h it is b uilt ) is s to re d in a n E g yp tia n p yra m id , giv e n it s m ass is a b o ut 3 ✕ 1 0 9 k g a n d it s c e n te r o f m ass is 1 6.0 m a b o ve t h e s u rro un d in g g ro un d ? J (b ) W hat is t h e r a tio o f t h is e n erg y t o t h e d aily f o od in ta ke o f a p ers o n ( 1 .2 ✕ 1 0 7 J )? :1 A ddit io nal M ate ria ls R ea d in g In a d o w nhill s ki r a ce s u rp ris in g ly lit tle a d va n ta g e is g ain ed b y g ettin g a r u n nin g s ta rt. T his is b eca u se t h e in it ia l k in etic e n erg y is s m all c o m pare d w it h t h e g ain in g ra vit a tio nal p o te n tia l e n erg y e ve n o n s m all h ills . T o d em onstra te t h is , ﬁ nd t h e ﬁ nal s p eed a n d t h e t im e t a ke n f o r a s kie r w ho s kie s 7 0.0 m a lo ng a 2 5 ° s lo pe n eg le ctin g f ric tio n f o r t h e f o llo w in g t w o ca se s. ( N ote t h at t h is t im e d if fe re n ce c a n b e v e ry s ig niﬁ ca n t in c o m petit iv e e ve n ts s o it is s till w orth w hile t o g et a r u n nin g s ta rt.) ( a ) s ta rtin g f ro m r e st ﬁ nal s p eed m /s tim e t a ke n s (b ) s ta rtin g w it h a n in it ia l s p eed o f 3 .0 0 m /s ﬁ nal s p eed 5. [–/4 Points ] OSCOLPHYS1 7.3.017. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 6. [–/4 Points ] OSCOLPHYS1 7.3.021. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER p m/s tim e t a ke n s A ddit io nal M ate ria ls R ea d in g A 3.5 0 ✕ 1 0 5 k g s u b w ay t ra in is b ro ug ht t o a s to p f ro m a s p eed o f 0 .5 00 m /s in 0 .4 00 m b y a la rg e s p rin g b um per a t t h e en d o f it s t ra ck. W hat is t h e f o rc e c o nsta n t k o f t h e s p rin g ? N /m A ddit io nal M ate ria ls R ea d in g A 50.0 k g s kie r w it h a n in it ia l s p eed o f 1 2.0 m /s c o asts u p a 2 .5 0 m h ig h r is e a s s h o w n in F ig ure 6 .2 3. F in d h is ﬁ nal sp eed a t t h e t o p, g iv e n t h at t h e c o eﬃ cie n t o f f ric tio n b etw een h er s kis a n d t h e s n o w is 0 .0 800. ( H in t: F in d t h e d is ta n ce tra ve le d u p t h e in clin e a ssu m in g a s tra ig ht-lin e p ath a s s h o w n in t h e ﬁ g ure .) m /s F ig ure 6 .2 3 Addit io nal M ate ria ls R ea d in g 7. [–/4 Points ] OSCOLPHYS1 7.4.022. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 8. [–/4 Points ] OSCOLPHYS1 7.5.024. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A p ers o n in g o od p hys ic a l c o nd it io n c a n p ut o ut 1 00 W o f u se fu l p o w er f o r s e ve ra l h o urs a t a s tr e tc h , p erh ap s b y p ed alin g a m ech an is m t h at d riv e s a n e le ctr ic g en era to r. N eg le ctin g a n y p ro ble m s o f g en era to r e ﬃ cie n cy a n d p ra ctic a l co nsid era tio ns s u ch a s r e stin g t im e: (a ) H ow m an y p eo ple w ould it t a ke t o r u n a 5 .0 0 k W e le ctr ic c lo th es d ry e r? p eo ple ( b ) H ow m an y p eo ple w ould it t a ke t o r e p la ce a la rg e e le ctr ic p o w er p la n t t h at g en era te s 9 00 M W ? peo ple A ddit io nal M ate ria ls R ea d in g (a ) W hat is t h e e ﬃ cie n cy o f a n o ut-o f-c o nd it io n p ro fe sso r w ho d o es 2 .1 0 ✕ 10 5 J o f u se fu l w ork w hile m eta b o liz in g 5 00 kc a l o f f o od e n erg y? % (b ) H ow m an y f o od c a lo rie s w ould a w ell- c o nd it io ned a th le te m eta b o liz e in d o in g t h e s a m e w ork w it h a n e ﬃ cie n cy o f 20 % ? k c a l Addit io nal M ate ria ls R ea d in g 9. [–/4 Points ] OSCOLPHYS1 7.7.032. DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 10 . [–/4 Points ] OSCOLPHYS1 7.8.047. 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