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Palak Verma
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To keep the can immersed, an external downward force is needed to balance the net upward force(=F'b-W).
F'b is the buoyant force (due to hydrodynamic pressure) on the can, and W is the weight of the can and its contents. The "net upward force" as used in the present context is the buoyant force minus the weight.Palak Verma said:To keep the can immersed, an external downward force is needed to balance the net upward force(=F'b-W).
The net upward force, also known as the resultant upward force, is the combination of all the forces acting on an object in an upward direction. It is the total force that is responsible for the object's upward motion or acceleration.
Net upward force is calculated by adding up all the individual forces acting on an object in an upward direction and taking into account their direction and magnitude. This can be done using vector addition or by using Newton's second law of motion, which states that the net force is equal to the mass of an object multiplied by its acceleration.
Some examples of net upward force include the force of gravity pulling an object towards the sky, the lift force of an airplane's wings, the buoyant force on an object in water, and the force exerted by a person's hand when lifting a book off a table.
The net upward force determines the direction and rate of an object's motion. If the net upward force is greater than the net downward force, the object will accelerate upwards. If the net upward force is equal to the net downward force, the object will remain at a constant velocity. And if the net upward force is less than the net downward force, the object will accelerate downwards.
Yes, net upward force can be negative if the net downward force is greater than the net upward force. This can happen, for example, when an object is falling towards the ground or when the force of gravity is greater than the lift force on an airplane, causing it to descend.