Physics 1999 P2

8/11/2019 Physics 1999 P2

1/12

. . . . , . . .-.. ._ -~- ----..::

SECONDARY EDUCATION CERTIFICATEEXAMINATION

Ilyhours

You MUST use this answer booklet when responding to the questions. For each question, write

your answer in the space provided and return the answer booklet at the end of the examination.

ALL WORKING MUST BE SHOWN in this booklet, since marks will beawarded for correct steps

in calculations.

Copyright @ 1998 Caribbean Examinations Council.

All rights reserved.

8/11/2019 Physics 1999 P2

2/12

i'

'~

; .., ' ,,

,,

i ,

:1? i. , .

,

" ,! ;

, ' i

" i

; Ii.. .. . ;, ; . .

i < :

i i ii

i i.~i

, i! !;~ i "~ ;

i r ' ~. I t ! t,' ,J . ~ f!i Ii. ; i

.,f .,' I . ' '. t f t j ~ f !"" '. j ii i i I i

TiTj

: i~ '1'. ; - - ;j' l i ;t! j - t i 1 j . i

i i i 1 j ii i

i !i t,..,i

! f !'fj ; j.: j

it i..i I

! i !i ;i ,j

ii,

iii i1 i . i!"! i

t ~t ~ ~ ; , t..~ t f t; j '!

,t).i.! !~!

!

~~I ;

;

t i i! l!

i t t ~f !

j ~ i

~~! ti ; i i

J.__L-L _

-~- :-.~

'dj

T : ;; t j. ~

I

; "

; , j

-4

" ' :" ~ I

,

i .. :1\ ..

i. '

.. "

.

;

, ;.

i ; . . i-

.;. ~.i j

.,

::,',' r ; 1: . : :i :f.jJ. t ~.j

> f ;"r~

t ~ i 4!'1 ~! :.

.~

ii:'!i t :.~-----~

I

Figure J ahove represents a cross section of a tahle knife being used to prise off the lid of

acan.

(hj The knife when llsed inthis manner acts as asimple machine. StMethe name ofthe simplemachine.

(c) On Figure 1, (i) indicate the position of the pivot, P, and (ii) draw an an-ow to show the

direction of the force, F, which the knife exerts on the lid. ( 2marks)

8/11/2019 Physics 1999 P2

6/12

(e) Calculate the magnitude of the force, F, which the knife exerts on the lid. (Ignore the mass

of the knife.)

The can exe,ts all upward force at point, T', 011the knife. What isthe value of this force just

before the lid moves?

(g) Htlle force, F, istoo small to lift the lid, suggest TWO changes you might make to increase

the value of F.

8/11/2019 Physics 1999 P2

7/12

A transverse wave Oil the surface of a liquid has a wavelength of 1.8cm. Explail1 wbat is

meant by a transverse wave ami the wOlJrlengrh of the wave.

(b) Figure 2 below is adisplacement-time graph representing the wave described in part (a)

above.

Displacement t

O.9