1970-01-08 — Page 27

Z LIBRARY

育教僑 頁三第張七第 日一初月二十年西己愿夏

WAH KIU YAT PO

報日僑華

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四期星

日八月一年〇七九一曆公年九十五國民華中

CITY

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lift which as going of 9. A person, standing in a

with constant upward acceleration, exerte on the floor of the lift. This push force 14 (A) always equal to his weight (B) always less than his weight

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(C) always greater than his weight

49%

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D) greater than his weight only when nie

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王淑方。

10英文中學會考試題預習專欄

文書院主編

物理科

(+)

PHYSICA (10)

acceleration is greater than g(32 ft/sec/seol (E) greater than his weight obly when has

acceleration is less than (32 ft/sec/sec)

0. The kinetic energy or an onjeos 1a

I directly proportional to its velocity

II directly proportional to its mase III directly proportional to the square u

velocity

I directly proportional to the square or

momentum

141

[ht Tourist Bald that food very much.

be (she) liked Chinese

lo the 10mum, a test in the form of Multiple Choice

Question is given. Students are advised to answer

paper within 40 min.

thie

Choose the BIST AND WEMO complete the statemente.

L

that Betisry Lam quen vaude of

8 uniform metre weighing 200 grams can be balanced by a weight of 800 grame, at the 100 en mark, if the fulorum is placed at the point, in centimetre.

mark.

(A) 4 (B) 40 (0) 60 (D) 90 (B) 95

2

which of the following graphs shows that a moving vody 18 de oreasing its velocity?

12

A

Statements correct

(A) I, II and III only (B) II, III and IV only (C) III. IV and I only

(10) She said that she anould be reading exactly

the same book the following Wednesday as she

was reading that day.

(1) The merchant said that before it closed.

MINOL

Ku to tn e bank

(12)Bill said to Ann the one was an excellent

しか

singer.

(13) Chan Sing on

(D) IV. 1 and 11 only (B) other combination

A 12-lb block, resting on a Emcorp Tople រង attached to one end of a string which passing over a Amooth pulley fixed at the edge of the table The other end 18 attached toe a 4-1b wody which bangs freely The value of the acceleration. in ft/sac/sec, of the combination when released (A. O (B) 1/8 (C) 1/8 (D) 0 (E) 8

A cylinder 15 rolled, up an incline by the

what minimum force 19 aflangement shown

required if the angle 16 300 YL. 100% weight of the cylinder 1.1.

(A) ib.wt.

(D) cus 30 ib.wt

(B) 1 lb.wt.

(E) / Kan 300 10 wt

を

(c) 2 ib.wt

ゴ

The

45

vainese but he had

learned English at school. (14) Lilian said that she would take her (him) to

the cinema ⟫

(15) She said tha, one was going to swim the next

day.

18. The dare's apparatus is used to find the

specific gravity of liquid X. The measurements of heights are given. The specific gravity of the liquid 18:

(A) 0.125 (B) u.o 10) 1.20

(B) undetermined, since guid levels on DotA 1

limbe are equal

A undetermined, since the liquid levels on both

beakers are unequal

VELOCITY IN

TY/SEC

4.

W

hi

the

The motion of two objecta a and B 18 described by the velocity-time graph below. They start st Bame time and from the same origin. at which of the Time specified 1. 11, 111 and 19 do they cover the same distance?

A_

B

а

13. A man hoists an object, using the frictionlasa pulley shown in the diagram, by exerting a downward force on the rope o point Y. When he exerts downward force at point Y or magnitude F. the object accelerations upwards at a rete equal to a. If be now exerts a downward force at point Y of magnitude 2F, the object will accelerate upward at a rate.

1. greater than Za

II. equal to 2a

11. greater than a

IV. less than 2a

(A) I, II, III, only

(B) I, III only

(C) II, IV only

(D) IV only

(B) other combination

wwen

дилов

- 16 om. b . 20 cm.

2

19. A 80-gm wooden ball, S.G. 0.8, 18 Buspended by

spring-balance passing a frictionless pulley as shown The reading of the balance aṇ go.wt. 184 (a) Ó (B) 20 (3) 26(D) 46~(B),78

1 TIME

IN SEC

(D) IV only

(E) other combination :

'(A) I only

(B) I and II only

(C) I, II and III only

body is thrown straight up with a speed of 16

fte per seo. How high does it rise?

(A) Art. (B) # ft. (C) 4 st. (D) D 21. AN) JOIT

14. A wooden block is at reet on a horizontal table.

The coefficient of sliding friction between the block and the top of the table 10 aqual to A If a forо8 18 now applied to the block in horizontal direction, the block may

2

T. scelerate in the direction of we applied

fcroe

II. remain at rest

[11

move with a constant velocity in tna direction of the applied foroS

oil

3.g. 0.8

20 03

30 om

water

29 on

In the force diagram above, OA and OB represent two forees. Their resultant is represented by (A) AR (B) BA (c) oc (#) OD (E) OE

6. à simple pendulum consists of a small bob hanging

from a relative long cord whose weight is negligible with respect to the bob. If the cord is 3 ft Long and the suspended bob is drawn until it is 1 ft higher thas its initial position. The speed of tus bob, in ft/sec. as 1 t passes through its lowest

parition in

(A) 4√2 (8) 8 (6) 8 √ (D) 68

(E) insufficient data ziven. 20 masa of tba bob

10 not given

Lv. acoelerate in a direction other than the

direction of the applied force

(4) I. II, III only (D) IV only

a) I, III only

.C) II. IV only

(E) other combination

15. A truck weighing 10 tons and travelling at 14

m.p.b. collides with a stationary truck 30 tons. After collision, the two trucka travel together. Their common velocity, in m.p.b., is (A) 1.5 (B) 1.5 (C) 4.7 (D) 7 (E) **

> which pr сде

pressure at (a) w (B) K

نيا

hes liquid column

the greatest the bottom of the vessel?

(C) Y (D) Z. (E) at the same

20

Objects X, Y, Z are of equal mass, X falls vertically downwards at-60 ft/sec; Y risea verticall upwards at 60 ft/sec; and Z moves horizon tolly In

a straight line at 60 ft/sec.

which object will have the greatest kinetic anergy"

(4) X (B) C (0) Lu) yame kinetic energy (E) insufficient data provided no conclusion.

can be drawn

21. The latitude at which the period of vibration of a

given simple pendulum is least at sea level (C) 45° (D) 60° (E) 90°

(A) 0°. (B) 300

22. A sture 18 dropped from a cliff into a Lake 576

feat below. The time taken for the stone to reach the lake 1, in seconda

(A) (B) 6 (C) 8 (D) 10 187 32

23. The mass of a body 18 best defined a

(A) a measurement of the weight of the body (B) a measurement of the density of the bods (C) a measurement of the rigidity of the body (D) a measurement of the resistance of the change

of velocity of the body

(E)

measurement of the reß16:0 of direction of the body

ايه

VALO

CHAIKO

IE. celoted to whjob of the

(A) Mechanical advantage

(D) Power

(E) Momentum

}

Masa I

following

distance tiwo

(B) work done

(c) Efficiency

>

A body which,

per Bec has a made of

(D thirty-two ounces

(E) thirty~ING pounds

when acted upon by force of one

poundal, acquires

An acceleration of a ft per

(A) one pound weight

(B) one pound

(C) one gram

eel

Tas

diameters of the pistons of a hydraulic press are 2 and 8 inches respectively. If the omall pistoň moves 4 inches on each stroke, to lift the larger piston 2 inches the number of strokeB the smaller piston has to make i (a) 4

(B) 8 (C) 16

(D) 32 (E) 64

124. If two masses of 5 and 10 ib, respectively,

connected by a rubber band, are pulled apart ana then released, it fellowB (A) they move on

tbat

in the Bame direction

(B) stretching force 30 not the same for anch mass (C) the larger mass will have the greater

acceleration

(D) the two masser will meet at a point midway

between them

(E) the smaller mass will pave

of obange of velocity

but grea vol #TO

2. A stone wel gho 125 grams in air and 75 grame in water. The specific gravity of the stone 15 (A) 1.67 (B) 2.5 (C) 2.75 (D) 3.0 (E) 3.5