you will pull (by hand) out on the plunger of a closed ended syringe
and thus create a vacuum. The diameter of the syringe is about 2.0 cm. What
amount of force will you have to provide? (Hint: air pressure will exist on only
one side of the piston)

Question

you will pull (by hand) out on the plunger of a closed ended syringe
and thus create a vacuum. The diameter of the syringe is about 2.0 cm. What
amount of force will you have to provide? (Hint: air pressure will exist on only
one side of the piston)

badhi · Answer

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find the force excerted on the surface of the plunger by the atmospheric pressure ($P_a\times A$) . Then, $$F = P_aA$$