F=ma 2025 Problem 21

Physics · mechanics

Problem

As shown in the figure, water flows through a pipe with a radius of

5 cm

at a velocity of

10 cm/s

before entering a narrower section of pipe with a radius of

2.5 cm

. --- Question: What is the difference in the speed of water between the two pipes? (A)

20 cm/s

. (B)

30 cm/s

. (C)

40 cm/s

. (D)

50 cm/s

. (E)

60 cm/s

. *Note: This problem references figure(s): `image_question/F=MA_2025_21_1.png`*