A hail and a rain drop of the same radius are released from the same height, the rain drop will reach
Correct answer: B. After hail
- A. Before hail
- B. After hail
- C. At the same time
- D. None of the above
Explanation
The correct answer is option B: 'After hail'. The rain drop, being less dense than the hail, experiences less gravitational force acting on it compared to the denser hail drop. As a result, the hail drop, which is heavier and has a different interaction with air resistance, reaches the ground first. Options A and C are incorrect because they suggest incorrect relationships in falling speed based on density and drag. Option D is also incorrect as it dismisses the correct answer provided in option B.
This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.
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About Terminal Velocity
Terminal velocity is the constant speed reached when gravitational force is balanced by fluid resistance. The topic covers drag, buoyant force, the conditions for zero acceleration, and how viscosity, object size, shape and density affect the limiting speed, with a distinction between free fall before and after terminal velocity.
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