Post on 21-May-2017
SMK DATO ABDUL RAHMAN YAAKUB, BOTA KANAN, 32600 BOTA, PERAKFizik
PEPERIKSAAN PERTENGAHAN TAHUN 2014 April 2014 1 Jam 30 MinNama Pelajar: Kelas: Markah :
Section ABahagian A
[ 28 marks ][ 28 markah ]
Answer all questions in this section.Jawab semua soalan dalam bahagian ini.
1 A student carries out an experiment to investigate the relationship between the period of oscillation, T, and the mass of the load, m, of a spring.The results of the experiment are shown in the graph of T2 against m in Diagram below.Seorang murid menjalankan eksperimen untuk menyiasat hubungan antara tempoh ayunan, T, dengan jisim beban m, bagi sebuah spring.Keputusan eksperimen ini ditunjukkan oleh graf T2 melawan m dalam Rajah di bawah.
1
0.050
0.25
0.50
0.75
1.00
1.25
1.50
0.10 0.15 0.20 0.25 0.30
T / s Graph of T against mGraf T melawan m
m / kg
2 22
2
(a) Based on the graph in Diagram above:Berdasarkan graf pada Rajah di atas:
(i) State the relationship between T2 and m.Nyatakan hubungan antara T2 dengan m.
[ 1 mark/ markah]
(ii) Determine the value T when m = 0.30 kg.Show on the graph, how you determine the value of T.Tentukan nilai T apabila m=0.30 kgTunjukkan pada graf itu bagaimana anda menenukan nilai T.
T = s[ 3 marks/ markah]
(iii) Calculate the gradient, h, of the graph.Show on the graph how you calculate h.
2
Hitungkan kecerunan graf,h, bagi graf itu.Tunjukkan pada graf itu bagaimana anda menghitung h.
h= s2 kg-1
[ 3 marks/ markah]
(b)
The spring constant, k, is give by the formula k=,4
h
where h is the gradient
of the graph and =3.14Calculate the value of k.
Pemalar spring k, diberi oleh formula k=,4
h
dengan keadaan h ialah
kecerunan graf dan =3.14Hitung nilai k.
K= [ 2 marks/ markah]
(c) The relationship between energy stored in the spring, E, and the spring constant,
k, is E=kx
21
2, where x is the extension of the spring.Using the answer in (b), calculate the energy stored in the spring when x=0.10m.Hubungan antara tenaga yang tersimpan di dalam spring, E, dengan pemalar
spring, k, ialah Ekx
21
2, dengan keadaan x ialah pemanjangan spring.Menggunakan jawapan di (b), hitung tenaga yang tersimpan di dalam spring itu apabila x = 0.10m.
3
E= [ 2 marks/ markah]
(d) State one precaution that should be taken to improve the accuracy of the result of this experiment.Nyatakan satu langkah berjaga-jaga yang perlu diambil untuk meningkatkan kejituan bacaan dalam eksperimen ini.
[ 1 mark/ markah]
END OF QUESTION PAPER KERTAS SOALAN TAMAT
ANSWER
1 (a) (i)
(ii)
(iii)
T2 increases linearly with m//T2 increases, m increases
- draw the extrapolation line and show the vertical line corresponding to m=0.30- state the value of T2 (within range 1.45-1.50)- determine the value of T(within range 1.30-1.22)
– draw a sufficiently large triangle/ 3×3 correct substitution (follow candidate’s triangle)
25.020.025.1
// corresponding values
4.2(within range 4.1 to 4.3)
11
111
1
1
(b)2.414.34
(e.c.f)(a)(iii)
2.99kg s-2 (with range 2.92-3.06)
1
1
4
(c)
E= 21
×2.99×0.12
= 0.015J
1
1(d) - do not exceed the elastic limit of the spring
- position of the eyes must be aligned with the scale on the stopwatch
- repeat the experiment and take the average reading
1
12
5