A hail and a rain drop of same radius are released from same height, then 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
When objects of the same size fall through the air, the effects of air resistance and material density become significant. A raindrop, being less dense and having more surface area relative to its mass, experiences greater air resistance compared to a hailstone, which is denser and has a more compact structure. Consequently, the hailstone, with lesser relative air resistance, falls faster and reaches the ground before the raindrop. Hence, Option B is correct. Options A and C are incorrect because they disregard the differences in density and air resistance, and Option D is incorrect as Option B is the valid explanation of the scenario.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Fluid Dynamics
Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
Practise Fluid Dynamics
363 free Fluid Dynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Fluid Dynamics questions
Two meter high tank is full of water, a hole is made in the middle of the tank. The speed of efflux is
The viscous drag on a small spherical body (moving with slow speed v) is proportional to
Which of the following is not the characteristic of turbulent flow
The speed v of a liquid in a tube depends on the change in pressure ΔP and the density ρ of the liquid. The speed is given by the equation. v=k (ΔP/ρ) Where k is a constant that has no units. What is the value of n?
A parachutist is falling constant (terminal) velocity. Which statement is not correct?
Water flows through a constriction in horizontal pipe as it enters constriction, water's: