Medium
What is dynamic lift?
(N/A) Dynamic lift is the force that acts on a body,such as an airplane wing,a hydrofoil,or a spinning ball,by virtue of its motion through a fluid.
It occurs when a body moves through a fluid (like air or water) and experiences a pressure difference due to its shape,orientation,or rotation (the Magnus effect).
In many sports such as cricket,tennis,baseball,or golf,dynamic lift is observed when a spinning ball deviates from its expected parabolic trajectory due to the interaction between its spin and the surrounding air.
It occurs when a body moves through a fluid (like air or water) and experiences a pressure difference due to its shape,orientation,or rotation (the Magnus effect).
In many sports such as cricket,tennis,baseball,or golf,dynamic lift is observed when a spinning ball deviates from its expected parabolic trajectory due to the interaction between its spin and the surrounding air.
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$27$ equal small water drops combine to form a big drop. If the surface tension of water is $T$ and the radius of a small drop is $r$,then:
$(A)$ The excess pressure inside the big drop is three times the excess pressure inside the small drop.
$(B)$ Surface energy decreases in this process.
$(C)$ In this process,$72 \pi r^2 T$ energy is released.
$(D)$ The radius of the big drop is $3r$.
The true statements are:
$(A)$ The excess pressure inside the big drop is three times the excess pressure inside the small drop.
$(B)$ Surface energy decreases in this process.
$(C)$ In this process,$72 \pi r^2 T$ energy is released.
$(D)$ The radius of the big drop is $3r$.
The true statements are:
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