CHAP#6  FLUID DYNAMICS

307. The drag force increases with increase with  Speed of the object increase

308. The resistance offered by fluids to the motion of the objects is called Viscous drag

309. When the drag force is equal to body weight then the body continues to fall  At steady speedA

310. The terminal velocity is directly proportional to square of   radius

311. For ideal liquid the fluid motion is always  Laminar

312. Mass flow into the volume must be equal to the mass flow rate out Equation of continuity

313. Area of pipe x velocity of fluid = Constant

 314. The speed of fluid through pipe is inversely proportional to the  Area of the pipe

315. The relationship between pressure, flow speed and for flow of ideal fluid is Bernoulli’s equation

317. When an object slides at constant speed down an inclined plane, the co- efficient of friction may  Tan θ

318. The ratio of heat accepted to the heat rejected by the carnot engine gives  The efficiency of working substances

319. The acceleration of falling body in fluid depends upon Velocity, and density of body and  Viscosity of fluid

320. The direction of torque as perpendicular to plane of  Force and radius

 323. Matter is made up of  Atoms

 324. The SI unit of viscosity is  Kg m-1 s-1 

325. The dimension of co-efficient of viscosity is  [M L-1 T-1 ]

326. The study of properties of fluids at rest is called  Fluid statics 

327. The study of properties of fluids at motion is called  Fluid dynamics  

328. The fluid which is incompressible and non-viscous is called  Ideal fluid 

329. At terminal velocity, fluid friction is  Maximum 

331. With, increase in temperature the viscosity  Decrease for liquids 

333. The terminal velocity of a small sphere is directly proportional to the  Radius 2

334. Equation of continuity is  A1 v1 = A2 v2

336. Surface tension of water is due to  Inter molecular attractions 

337. A man standing near fast moving train will falls  Towards train