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Unformatted text preview: Test #0016? EXAM 1: Vectors, Acceieration. 8: Force
Physics 130A
Fall. 2004 AL]. numbers are good to 3 signiﬁcant ﬁgures. Answers may be rounded to 2
signiﬁcant ﬁgures. Use a number 2 pencil for the ParSCORE form and avoid erasure. If you smudge the
answer fon'n, switch to another one. Extra number 2 penciis and loan calculators are avaiiabie on the table at the front of
the room. Put your ParSCDRE form behind this page when the test is ﬁnished. .*’11_. . r"_
r we ' its Name  P 9339 Print You must hand in this form with
the ParSCORE form or no credit. 1. A tennis ball is thrown horizontally. Neglecting air resistance. at the moment the hall is
released, it has an acceleration . verticaliy and horizontally.
'oally but not horizontally.
c. hatizontally but not vetticaﬂy.
cl. neither verticalty nor horizontally.
e. of zero. 2. If mass M = 12 kg, find the tension T3. 5%?) 5?.9 N
b'; r93 N
o. 90.5 N
d. 102 N e. none of these 3. A ball is thrown into the air, reaches a maximum height. and then begins to fail down.
The acceleration due to gravity is a. t a maximum just as the ball is reieased. 'Hgﬁat a minimum at the maximum height.
e. at a maximum just before the hall hits the ground. d. at a minimum somewhere between release and the maximum height. @ene of these. 4. The cord is a volume of cut weed equal to a stack 3 ft long. 4 ft wide, and 4 ft high.
if 1 ﬁ: = GEMS m, how many cards of wood are in 8 cubic: meters? 3. 2.21 cards
I). 3.31 curds ‘ _r—__ ‘—
§T4.41 cords H
d. 5.52 cords
e. none of these
.a . 1 . 1
I Z ~ _*_. z; ? x 1"
t. : ’ tic1* 5. A weight is hung by a cord from the ceiling of an elevator. The tension in the cord
will be the greatest when ,af the elevator is standing still.
Is. he elevator is dropping at a constant velocity.
2”: he elevator is dropping at a constant acceleration. ; the elevator is rising at a constant velocity.
he elevator is rising at a constant acceleration. 6. An airplane which flies 400 milesfhoor in still air r'nust compensate for a crosswinci
from the west by flying at an angle of 30" west of north. What is the speed of the
crosswind‘? a. mo milesfhour 15:) 150 rnilesfhoor c. 200 milesfhoor :_,_:r 11‘ r
o. 25D milesfhour \ r ~= " ' ' E». e. none of these s “H‘ \II'.
ea. tax _
 u’ NJ H——~
t: N
v“? \ gift“; 1
iv“? l life' 3 7—.
VIN __ VIP—Hr” x _ *
"Hi'lrja FaP F". A small rectangular building requires exactly 4 gallons of paint to completely cover
it. If all dimensions of the building [length1 width, height) were doubled, how much paint would be required to completelyr cover it? a. 8 gallons
b. 16 gallons
ﬁg? 32 gallons d. 64 gallons «I A" : H‘s:zT'i’F3Es’1‘; Lf
e. none of these at, "
I“ g. 'ﬂfﬁif‘ LP"; 8. A block of weight 45C. N rests on a horizontal surface. A Hit] N force is applied to the
block directed upward at angle 60” relative to the horizontal. If the force is barely
sufficient to get the block moving. determine the coefficient of static friction between the block and the surface. ri.
EVEN 38 23 a. o.1so ,4“? _ c. 0.1 so ] —*——
@234 i _ e. none of these .  Lr : n H 'L(E. if. .r.  I In. in: '2':
g. “is r. _ .
"—'1 ﬁll"h J..
air— '1‘“: f“ : Fs~‘rt€i . _
1? E11? IREE 9. Mass M1 exerts a gravitational force F on a second mass M3 3 distance cl away. If the
distance d is tripled. the force is a. duced to oneninth of its original ilialiie.
r . educed to one—third of its original value. Icfunchanged.
cl. increased by a factor of three.
e. increased by a factor of nine. 1} 10. A pebble is dropped down a well to the water's surface ?D m below. How much time
eiapses before it hits the water? a. 3.19 s
h. 3.50 s @338 s . T
d. 4.04 s 'I e. none of these ...
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 Fall '05
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