Physics
Grade-9
Easy
Question
What is common between these images to overcome fluid friction?
- Nature of the fluid
- Shape of the object
- Size of the object
- Speed of the fluid
Hint:
When an object moves through a fluid, it expends energy fighting the friction. When fluid flows beside an object, its shape significantly affects whether the fluid friction is increased or decreased.
The correct answer is: Shape of the object
The common between these images to overcome fluid friction is the Shape of the object.
- The fluid friction is caused to resist the motion of an object moving on the liquid.
- To overcome the fluid and air friction the objects are designed with particular shapes.
- Both birds and aeroplanes have unique/specific shapes that enable airborne flight.
- Fish have a unique streamlined body that enables them to move constantly in water and even stops them from losing energy from fluid friction, such as a tail and fins.
- To ensure optimal use and movement, vehicles are designed to experience the least amount of fluid friction when moving.
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