Name
Physics10
Fall2014
fU S.r.< f l{ e y
Quiz #2: Newton's 2odand 3'd Laws
Question1 (2 points)
Your earis coastingon level groundat25 millu andyou applythe brakesuntil the car slowsto
10milhr. If you suddenlyreleasethe brakesnow, the car tendsto
a) momentarilyregainits higherinitial speed
@continue movingat 10miftr
c) decrease
in speedifno otherforcesact
Question2 (2 points)
As a ball falls,the actionforceis thepull of the Earth'smasson ths ball. Thereactionforceis
a) the air resistanceactingagainstthe ball
b) the acceleration
of the ball
pull
of
massontheEarth
the
ball's
@m.
d) non-existentin this case
e) noneofthese
Question3 (2 points)
An objectis droppedfrom rest.If we do nof ignoreair resistance,
asthe objectfalls, its velocity
andits acceleration
increases
,JI'^,rh A lo n f s' -re J\g't/\'pat/t^tru'"'El
r;.:.o....Iz^"tfrr^1
( bl decreases
laA$rta fuwnttA
,rX
c) remainsthe samewhetherin air or in vacuum
"tt ".t^"rlla
a) increases
/ta
,
-4
Question4 (2 points)
Whatis Newton's3'dlaw?How is Newton's3td law involved whenyoujump straightupward?
ae^"
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Question5 (2 points) ;r^M^>"A
An objectmoveswith a constant
:onstantvelocity.
velocity. Canyou conclude
concludethatno forceactson it? Defend W^bQ
your answer.
^t^^.c,o.,".. ^"f
,Va/)a ,Le1 a\ h "
c^o"n --tq M"d rY\.o
"P
c/dt\
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