Hey i have about 20 multiply choice questions in physics topics about 'force' 'momentum' 'energy' can u help to to do those

S ele ct o ne: 1 .5 1 m s - 1 E ast 1 .5 1 m s - 1 W est 0 .0 6 9 m s - 1 E ast 0 .0 6 9 m s - 1 W est A m od el a e ro p la n e f lie s in a h oriz o nta l c ir c u la r p ath a t t h e e n d o f a 1 0 m s tr in g w hic h is f ix e d a t t h e c e n tr e o f t h e c ir c le . If it s s p eed is a c o nsta n t 5 .0 m s - 1 , it s a c ce le ra tio n is : S ele ct o ne: 2 .5 m s - 2 1 .2 5 m s - 2 9 .8 m s - 2 Z ero 0 .0 0325 x 1 0 - 8 c m c an a ls o b e e xp re ss e d in m m a s: S ele ct o ne: 3 .2 5 x 1 0 - 11 m m 3 .2 5 x 1 0 - 12 m m 3 .2 5 x 1 0 - 9 m m 3 .2 5 x 1 0 - 10 m m F N DN P hysic s 2 0 20 S TD A   (G096605- AP9-Rashawn) Runxiao Li 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 2/8 Q uestio n 4 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 5 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 A n o b je ct o f m ass m s lid es d ow n a c o m ple te ly f r ic tio nle ss s u rfa c e a s s h ow n.

W hic h g ra p h c o rre ctly s h ow s t h e m om en tu m o f t h e o b je ct o ve r t im e?

S ele ct o ne:

A b ir d f lie s E ast a t 1 5 k m h - 1 o ve r a y a c h t ( b oat) w hic h s a il s a t 2 0 k m h - 1 S outh 3 0 o W est r e la tiv e t o t h e s e aflo or. T he v e cto r w hic h b est r e p re se n ts t h e v e lo cit y o f t h e b ir d r e la tiv e t o t h e y a c h t is :

S ele ct o ne: 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 3/8 Q uestio n 6 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 7 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 T he v e lo cit y — t im e g ra p h o f a p artic u la r o b je ct is a s s h ow n b elo w T he a ve ra g e v e lo cit y o f t h e o b je ct o ve r t h e 1 0 s e co nd p erio d is c lo se st t o :

S ele ct o ne: 0 .4 5 m s - 1 0 m s - 1 - 6 .7 5 m s - 1 6 .7 5 m s - 1 A n a rtil le ry s h ell is f ir e d f r o m t h e b arre l o f a s ta tio nary t a n k a t a s p eed o f 8 00 m s - 1 . T he b arre l is 1 .5 m lo ng . T he a c ce le ra tio n o f t h e s h ell ( a ss u m in g it is c o nsta n t) is c lo se st t o :

S ele ct o ne: 3 8 00 m s - 2 5 3 0 m s - 2 1 2 5 0 0 m s - 2 2 10 000 m s - 2 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 4/8 Q uestio n 8 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 9 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 A b od y m ove s a lo ng a lin ear t r a c k a c co rd in g t o t h is g ra p h.

A t t im e t = 6 s , t h e d is p la c e m en t a n d in sta n ta n eo us v e lo cit y a re :

S ele ct o ne: 1 1 c m , 2 .5 c m s - 1 1 1 c m , 4 .5 c m s - 1 1 1 c m , 3 .6 c m s - 1 5 c m , 4 .5 c m s - 1 N ew to nʼs s e co nd la w s ta te s t h at t h e n et f o rc e o n a n o b je ct is t h e p ro d uct o f t h e m ass a n d t h e a c ce le ra tio n o f t h e o b je ct. A s tu d en t p erfo rm s a n e xp erim en t a n d g ra p hs h er r e su lt s a s s h ow n.

T he n et f o rc e o n t h e o b je ct is c lo se st t o :

S ele ct o ne: 1 .0 N 0 .4 N 0 .5 N 2 .5 N 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 5/8 Q uestio n 1 0 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 1 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 2 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 A s o cce r b all is o n le ve l g ro und 1 0 m f r o m a f e n ce . It is k ic ke d d ir e ctly a t t h e f e n ce a n d b are ly g oes o ve r t h e f e n ce a t t h e h ig hest p oin t in it s f lig ht. T he f e n ce is 2 m h ig h. W hat is t h e a n g le f r o m t h e g ro und t h at t h e b all is k ic ke d ? S ele ct o ne: 2 2 o 3 6 o 4 5 o 1 8 o A r o lle r- c o aste r c ar o f m ass 8 50 k g is a t r e st o n it s t r a c k a t X .

W hen t h e b ra ke s a re r e le ase d , t h e c ar r o lls d ow n t h ro ug h Y a n d u p t o Z . T he d is ta n ce X Z ( m easu re d a lo ng t h e t r a c k) is 5 0 0m .

I f t h ere w as n o s ig nif ic an t f r ic tio n o p posin g t h e m otio n, t h e s p eed o f t h e c ar a t Z in m s - 1 w ould b e: S ele ct o ne: 2 4 3 2 1 2 2 8 T w o b lo b s o f m erc u ry r o ll o n a h oriz o nta l s u rfa c e w it h v e lo cit ie s a s s h ow n:

T heir c o llis io n is c o m ple te ly in ela stic ( i. e . t h ey m erg e in to o ne b lo b ). T he d ir e ctio n in w hic h t h is c o m bin ed b lo b m ove s im med ia te ly a fte r t h e c o llis io n is :

S ele ct o ne: W 5 6 o N W 3 7 o N N one, s in ce it is s ta tio nary .

N 3 1 o W 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 6/8 Q uestio n 1 3 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 4 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 5 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 T he v e lo cit y — t im e g ra p h o f a p artic u la r o b je ct is a s s h ow n b elo w T he m axim um m ag nit u d e o f t h e in sta n ta n eo us a c ce le ra tio n is :

S ele ct o ne: 3 m s - 2 0 m s - 2 0 .9 m s - 2 9 m s - 2 A lig ht- y e ar is d efin ed a s t h e d is ta n ce lig ht t r a ve ls in o ne y e ar.

I f P ro xim a C en ta u ri is a s ta r w hic h is 4 .2 2 lig ht- y e ars a w ay, d ete rm in e t h e t im e it t a ke s f o r a r a y o f lig ht t o r e ac h t h is s ta r f r o m E arth ( T he s p eed o f lig ht is 3 0 0000 k m s - 1 ) . S ele ct o ne: 8 .4 4 y e ars 5 76 8 m in u te s 4 .2 2 y e ars 1 .2 × 1 0 8 s e co nd s W hat is t h e c e n tr ip eta l a c ce le ra tio n ( re la tiv e t o t h e c e n te r) o f a p oin t o n t h e p erim ete r o f a b ic yc le w heel o f d ia m ete r 5 5 c m w hen t h e b ik e is m ovin g 8 .0 m s - 1 ? S ele ct o ne: 4 .4 0 m s - 2 1 4 .5 m s - 2 2 3 3 m s - 2 1 16 m s - 2 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 7/8 Q uestio n 1 6 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 7 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 1 8 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 A b lo ck a n d p ulle y s y ste m is s e t u p o n a s m ooth in clin e a s s h ow n. T he s tr in g is in exte n sib le .

I f t h e u nkn ow n m ass m a tta in s a v e lo cit y o f 3 .0 6 m s - 1 a fte r f a llin g a d is ta n ce o f 1 .5 m t h en t h e v a lu e o f m is : S ele ct o ne: 5 .3 k g 1 6 k g 1 2 k g 2 3 k g W hat is t h e f in al s p eed o f a 1 0 .0 k g c art, s ta rtin g f r o m r e st, w hen a n a ve ra g e f o rc e o f 3 .0 N is a p plie d t o it o ve r a p erio d o f t im e o f a m in u te ?

S ele ct o ne: 0 .3 m s - 1 1 8 m s - 1 1 8 0 m s - 1 0 .0 05 m s - 1 T he m om en tu m -tim e g ra p h o f a n o b je ct is d esc rib ed b y t h e f o llo w in g g ra p h.

T he m ag nit u d e o f t h e a ve ra g e n et f o rc e o f t h e o b je ct is c lo se st t o :

S ele ct o ne: 0 .6 0 N 5 .8 9 N 0 .3 8 N 6 .0 N 15/05/2020 TERM 1 Physics Assessment Quiz https://moodle.telt.unsw.edu.au/mod/quiz/attempt.php?attempt=7094960&cmid=3003723 8/8 Q uestio n 1 9 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 Q uestio n 2 0 N ot y e t a n sw ere d M ark e d o ut o f 1 .0 0 A b all is k ic ke d a t a n in it ia l v e lo cit y o f 3 0 m s - 1 , 6 0° t o t h e h oriz o nta l. T he b allʼs v e lo cit y a fte r 2 .6 5 s e co nd s is c lo se st t o : S ele ct o ne: 1 5 m s - 1 0 m s - 1 3 0 m s - 1 2 6 m s 1 A r o lle r- c o aste r c ar o f m ass 8 50 k g is a t r e st o n it s t r a c k a t X .

W hen t h e b ra ke s a re r e le ase d , t h e c ar r o lls d ow n t h ro ug h Y a n d u p t o Z . T he d is ta n ce X Z ( m easu re d a lo ng t h e t r a c k) is 5 0 0m .

I f t h ere is s ig nif ic an t f r ic tio n a n d t h e s p eed o f t h e c ar a t Z is a c tu ally 1 2 m s - 1 , t h e m ag nit u d e o f t h is f r ic tio nal f o rc e ( a ss u m ed t o b e c o nsta n t) is :

S ele ct o ne: 3 16 N 1 7 2 N 1 5 0 0 N 5 4 4 N