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2. Water flows in small-cross section of pipe with speed

Berikut ini adalah pertanyaan dari akbarandristra2 pada mata pelajaran Fisika untuk jenjang Sekolah Menengah Atas

2. Water flows in small-cross section of pipe with speed of 0,6 m/s. The ratio between small-cross section of pipe and large-cross section of pipe is 1 : 3. The speed of water in large-cross section area of pipe is ....A. 0,2 m/s
B. 0,5 m/s
C. 0,8 m/s
D. 1,2 m/s
E. 1,4 m/s​

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Penjelasan:

Since the pipe is incompressible, the volume flow rate must remain constant throughout the pipe. Therefore, the product of the cross-sectional area and the fluid velocity remains constant.

Let A1 and A2 be the small and large cross-sectional areas of the pipe, respectively, and let v1 and v2 be the velocities of the water in the small and large cross-sectional areas, respectively. We are given that:

A1 : A2 = 1 : 3

v1 = 0.6 m/s

We can use the equation of continuity to find v2:

A1v1 = A2v2

v2 = (A1v1) / A2

v2 = (1/3 * A2 * 0.6) / A2

v2 = 0.2 m/s

Therefore, the speed of water in the large-cross section area of pipe is 0.2 m/s, and the correct answer is (A) 0.2 m/s.

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Last Update: Tue, 08 Aug 23
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