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Unformatted text preview: E’hysics 101 FORM 0 [1} What is the apparent Weight of a 70.0 kg person inside an eievator which is descending
with an acceleration of 2.13 1.11/82? {A} 14.9 N @538 N [c] 687 N [D] 836 N [E] 914 N [2] As a car drives with its tires rolling ireely Without any slippage, the type of friction acting
b tween the tires and the road is
A} static friction. [B] kinetic friction.
a combination of static and kinetic friction.
[D] neither static nor kinetic iriction, but some other type of friction.
[E] It is impossible to tell What type of friction acts in this situation. [3 [ A 3. 00— kg mass and a 5. 00— kg mass hang vertically at the ends of a rope that goes over
an ideal pulley It the masses are released from rest} how long does it take for the 3. 00» kg mass to rise by 1. 00 1n? .,
[A] 0.40? s [13] 0.452 s [C] 0.735 s [B] 0.815 s [E] 0.903 s [4] An object of mass m— — 1. 0 kg 15 pulled by a constant force 2‘» (We: a distance of 2.0 rn in
the +2: direction. The force has a magnitude of 2. 5 “N and it is directed at an angle of 30°
with the +2: direction. Wha.t\ is the work done by F? [132.51 [1313.43 @433 [1315.03 [E]8.5J [5] What is the power needed to change the speed of a 1600—kg sport utility vehicle from
15.0 m/s to 40.0 m/s in 8.03 seconds? _ _
[A] 55.0 kW [B] 91.5 kW [C] 109 kW @138 kW [E] 207 kW [6] A force of 15 N applied to a spring compresses it by 4 cm. What is the potential energy
‘ of the spring in the compressed position? we.“ [B]0.2J @031 @1043 {E1933 [7 } A volleyball player bounces a 0. 300— kg ball changing its velocity irons" v. m (0.500 131/ s)z: +
(0. 700 m/s)y to v; — (1. 800 m/s)w + (1. 200 In/s)y. What IS the magnitude of the impulse
delivered to the ball? 1
@0418 @323 [B] 0.44.3 it? [c] 0.486 is? {D} 0.513 £3?— [E] [3.576 is? [8] A 3.0 kg object moves to the right at 4. 0 m/s. It collides head—on with a 60kg object
moving to the left at 2.0 m/s. Which statement is correct? " [A] The total momentum both beiore and after the collision is 24 Jim“.
[B ] BThe total momentum before the collision is 24 M, and after the collision is 0 5.2312. G] The total momentum before the coilision IS 0 ML, and after the coiiision 15 24.51—
D The total momentum both before and after the collision 1s zero.
E] None of the above is true. Physics 101 FORM 0 [9] An assault riﬂe ﬁres an eight—shot burst in 0.40 5. Each bullet has a mass of 7.5 g and a
speed of 600 m/s as it 1eaves the gun. What is the average recoil force on the gun during the burst? ‘
[11am [B] 11m [0mm {13175}: @goe [10] A pulley has an initiai angina]: epeed of 17.7 rad / s and a constant angular acceleration of
3.41 rad/52. Through what angle does the pulley turn in 7.44 s? [A] 38.6 rad [B] 85.2 rad [o] 165 rad @‘y 226 rad [E] 320 rad [11] A 0.071~kg toy airplane is tied to the ceiling with a string. When the airplane’s motor is '
started, it moves with a constant speed of 1.32 m/s in a horizontal circle of radius 0.47 m,‘
as Elustrateci in the ﬁgure. Ignore the effect of air resistance and ﬁnd (a) the magnitude and direction of the airplane’s acceleration,
(is) the angle 9 the String makes with the vertical,
(c) the tension in the string. mac?! #3; mamm tr: L312 ﬁ
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mhuHu————an—wﬂ—wml .mex'kﬁr Wit. CM 32 btWﬂ, 5115:“. m. 3.10? .._.
“A 6936 left Physics 101 FORM 8 [12} A block of mass m = 1.65 kg is held at rest on a frictionless ramp of height h = 58.5 cm,
as shown in the figure; When the block is released, it reaches the bottom of the ramp
and moves across a surface that is frictionless, except for a. rough—patch section of width
at = 21.5 cm that has a coefﬁcient of kinetic friction pk = 0.754. Ignore the eﬁect of air
resistance anti ﬁnd (a) the initial mechanical energy of the block, (b) the work done on the block by triction when it crosses the rough patch, (c) the speed 2; of the block after crossing the rough patch. I \CQ E; “3?: , Lazctlgosgggm E; r: K: { Ht: {M1}; "t' ”"3 j; ‘1: Hi 9,?“ Chg33‘); 01:20 E“; r SH}: (‘5..95513)? _; “#3.. Rough patch (b) wig?“ ”in” . ;
“3W ' d ' “if: “fit: (1 (SW [1114”: ”’45)“ {17746443 :3 ’1’!“ b»)
71:51.:ﬁ'k N to“: [“343 Q; New“? WJLW—m A
WP‘WLWQ at waist: tweet0,2133% . , Wfﬁléli (2,4qu3);  .1. a _ J A e
Mum/gm: get; riiubgWj’ﬁi 5., "ﬂ“ 5‘ . . , ,,  _. WWW
{ii/#102: ELt W4 “:1" U‘ﬂ/éPLtWN jﬁfzst‘ﬁﬂéﬂfLﬂtiﬂs Physics 101 FORM 0 FORMULAE SHEET Quadratic equation: (132 + bm + C m U ==> 3 m ”WM”: 5.4%” Vectors: El: «43% "i” Aw, A3 m“ AC086A, A? m AsinﬂA, A =1/Ai—l— A§,tan6A m if
£+§=(Am+Bm)cﬁ+(Ay+By)g}, £—§=A’+(m§), AFzFf—ﬁ
Relative velocity: 13’“, = 13’” + 5’30, ”m : —UAB Motion at constant acceleration: me E 22(15 2 0), '39 mm: ”(t m 0), 13$ 2 ” “3””
(Us —_—: '90:: + anti :2: m 330 "i" ﬁat: :1: z 930 ”l“ ”Uzi 'i' %amt2! 1):: 933 + 2(1):;(33 W m0) Free fall and projectile motion: ("1’ = g(—g), g 2 9.81 131/52, R 2 W Newton’s Laws: F‘net :2 21.7" = 111.5, ﬁBA = wﬁAB Weight: W = mg(~ﬂ), friction: kinetic: fk = nkN, static: f3 g ,usN Springs: Fm m —km, circular motion: EC? r— 3i;(—$), lip = m:2(—f) Work and Energy Wm PM: chosf? K w my, 2W : AK, P m —~ :1ij
Wc m —AU, Ug = mgy, Us = 113—, E = K + U, WM— w AB Impulse and Momentum: 52 I mo”, fm Elli = A}? If the not external imyulse 15 zero then pm: m E p := const
Two particle collision. mlvn + ”1202;, m mlvgf + mzvzf, completely inelastic: olf— —— 02f Elastic collision:  K3” — "K3 in one dimension: '02): _,. 91f"— .— oli— '02.;
Center of mass: wcm : Emgmé/ Emi, pcmm pm, rocket: F — 21K;
Rotational Motion: 271' rad : 1 rev m 360°, 3 2 TH, E) = 9% w = 2—113, 62 x ”AA"? w=wg+at, 6m69+§5ﬂizﬂ)i, 9209+wgt+%at2, w2=w§+2a(9v—99) ...
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 Spring '08
 Ashkenkai
 Physics

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