( a )
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Diagram 11.1 shows a parachutist descending using a parachute. The
rope used in making the parachute is very important to ensure the safety of
the parachutist. Table 11.1 below shows a few types of ropes and its
characteristic.
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Rajah 11.1 menunjukkan seorang ahli payung terjun turun menggunakan payung
terjun. Tali yang digunakan dalam membina payung terjun adalah amat penting
bagi menjamin keselamatan penerjun. Jadual 11.1 di bawah menunjukkan beberapa jenis tali dan ciri-cirinya. |
(i)
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What is gravitational force?
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Apakah daya tarikan
gravity?
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[1 mark / markah]
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(ii)
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You are asked to investigate the characteristic of the ropes in table
11.1 which could be used to make a parachute. Explain the suitability of each
characteristic in table and hence, determine which rope is the most suitable
to be used to make the parachute.
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[10 marks / markah]
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(b)
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During training, a parachutist descending with a uniform velocity
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Semasa suatu sesi latihan,
seorang penerjun payung terjun dengan halaju malar
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(i)
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Name 3 forces that act on the parachute
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Namakan 3 daya yang
bertindak keatas payung terjun
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[3 marks / markah]
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(ii)
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State the relationship between the 3 forces
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Nyatakan hubungan diantara
3 daya itu
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[2 marks / markah]
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(ii)
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Diagram 11.2 shows a pulley system with mass of 5 kg and 8 kg tied
together through frictionless pulley using an inelastic string. Find the
acceleration of both masses and the tension of the string
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Rajah 11.2 menunjukkan pemberat berjisim 5 kg dan 8 kg bersambung dengan tali
tak kenyal yang melalui takal licin. Hitungkan pecutan kedua-dua pemberat dan
ketegangan tali tak kenyal itu
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[4marks/markah]
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