What is drag? Write any two factors on which fluid friction depends. Why aeroplanes and submarines are designed to have a streamlined shape?
Answers
Answer:
Drag is the aerodynamic force that opposes an aircraft's motion through the air. ... If there is no fluid, there is no drag. Drag is generated by the difference in velocity between the solid object and the fluid. There must be motion between the object and the fluid. If there is no motion, there is no drag.
The frictional force on an object in a fluid depends on its speed with respect to the fluid. The frictional force also depends on the shape of the object and the nature of the fluid.
The aeroplanes and ships have streamlined shaped bodies to reduce drag. The streamlined shaped body experiences minimum resistance when travelling through water or air. It helps to reduce friction.
Explanation:
Hope it helps you
Answer:
drag is a force applied on a moving object ( of a specific shape ) which pushes its forward , it ends after a particular distance , ex : feathers attached at the end of the arrow produce drag to move forward , fan of a motor in motorboat creates drag in water by rotating to push the boat forward .
aeroplane and submarines r designed to have a streamlined shape to become stable in the air or water and to cause any harm to the passengers
Explanation:
hope it was helpful
pls mark as brainliest