A Hockey Puck Slides Off the Edge of a Platform

question 39

Multiple Choice

A hockey puck slides off the edge of a platform with an initial velocity of 20 m/s horizontally.The height of the platform above the ground is 2.0 m.What is the magnitude of the velocity of the puck just before it touches the ground? You can neglect air resistance.

• A)21 m/s
• B)22 m/s
• C)24 m/s
• D)25 m/s
• E)6.3 m/s

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Definitions:

Mucosa

The moist tissue layer lining some organs and body cavities, including the nose, mouth, lungs, and digestive tract, that secretes mucus.

Epithelial Tissue

Tissue that lines hollow organs and covers surfaces.

Periodontitis

A severe gum infection that damages the soft tissue and destroys the bone that supports your teeth.

Gingivitis

An inflammation of the gums, typically caused by a bacterial infection, which can lead to redness, swelling, and bleeding.