Home
Class 12
PHYSICS
A solid body moves through air, at very ...

A solid body moves through air, at very high speed V faster than the velocity of molecules Show that the drag force on the body is proportional to `AV^(2)` where A is the frontal area of the body.

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • UNIT & DIMENSIONS

    MOTION|Exercise Exercise - 2 (Level - I) (Section D -Basic Mathematics)|7 Videos

  • UNIT & DIMENSIONS

    MOTION|Exercise Exercise - 2 (Level - II) (Section A- Units)|2 Videos

  • UNIT & DIMENSIONS

    MOTION|Exercise Exercise - 2 (Level - I) (Section B- Dimensions)|5 Videos

  • Thermodynamics

    MOTION|Exercise EXERCISE - 3 SECTION b|26 Videos

  • UNITS AND DIMENSIONS, BASIC MATHEMATICS

    MOTION|Exercise PRACTICE QUESTION|4 Videos

Similar Questions

Explore conceptually related problems

A body travelling with a speed of more than the velocity of sound in air is said to travel with

If a body moves through a liquid or a gas then the fluid applies a force on the body which is called drag force. Direction of the drag force is always opposite to the motion of the body relative to the fluid. At low speeds of the body, drag frog ( F _(P)) is directly proportional to the speed. F_(D) = kv What K is a proportionally constant and it depends upon the dimension of the body moving in air at relatively high speeds, the drag force applied by air an the body is proportional to v^(2) Where this proportionally constant K can be given by K_(2) rho CA Where rho is the density of air C is another constant givig the drag property of air A is area of cross-section of the body Consider a case an object of mass m is released from a height h and it falls under gravity. As it's speed increases the drag force starts increasing on the object. Due to this at some instant, the object attains equilibrium. The speed attained by the body at this instant is called "terminal speed" of the body. Assume that the drag force applied by air on the body follows the relation F_(D) = kv ,neglect the force by buoyancy applied by air on the body then answer the following questions. What is the pattern of acceleration change of the body ?

If a body moves through a liquid or a gas then the fluid applies a force on the body which is called drag force. Direction of the drag force is always opposite to the motion of the body relative to the fluid. At low speeds of the body, drag frog ( F _(P)) is directly proportional to the speed. F_(D) = kv What K is a proportionally constant and it depends upon the dimension of the body moving in air at relatively high speeds, the drag force applied by air an the body is proportional to v^(2) Where this proportionally constant K can be given by K_(2) rho CA Where rho is the density of air C is another constant givig the drag property of air A is area of cross-section of the body Consider a case an object of mass m is released from a height h and it falls under gravity. As it's speed increases the drag force starts increasing on the object. Due to this at some instant, the object attains equilibrium. The speed attained by the body at this instant is called "terminal speed" of the body. Assume that the drag force applied by air on the body follows the relation F_(D) = kv ,neglect the force by buoyancy applied by air on the body then answer the following questions. What is the terminal speed of the object ?

The viscous force acting on a body moving through a liquid is proportional to its velocity. What is the dimensional formula for the constant of proportional to its velocity. What is the dimensional formula for the constant of proportionality?

A body of mass m is thrown straight up with a velocity Mq. Find the velocity u' with which the body comes down if the air drag equals cu^(2) where c is a constant and u is the velocity of the body.

A variable force F acts on a body which is free to move. The displacement of the body is proportional to t^(3) , where t = time. The power delivered by F to the body will be proportional to

The velocity v and displacement r of a body are related as v^(2) =kr , where k is a constant. The acceleration of the body is