What must be the contact area between a suction cup (completely evacuated) and a ceiling if the

step 1 The weight of the student is given by force equals m g and if the area of the suction cup is giv

What must be the contact area between a suction cup...

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Key Concepts

Atmospheric Pressure

Atmospheric pressure is the pressure exerted by the weight of the Earth's atmosphere. It acts uniformly on surfaces and is the force per unit area applied to objects, such as suction cups, and is key in creating the holding force when a vacuum is applied.

Force (Weight)

Weight is the gravitational force acting on an object and is calculated by multiplying the mass by the acceleration due to gravity. In this context, the weight of the object (or student) determines the minimum force that the suction cup must counteract to maintain attachment.

Pressure Difference

The pressure difference is the variation between the atmospheric pressure outside the suction cup and the near-zero pressure inside when a vacuum is created. This difference creates a net force over the contact area of the cup, allowing it to stick to surfaces.

Contact Area

The contact area is the surface area over which the pressure difference acts. It directly determines the total force available to hold an object in place, as a larger area means a greater cumulative force from the pressure difference, which must at least equal the weight of the object being supported.

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