A Ball Is Thrown Upward from an 80-Ft Tower with an Initial

question 57

Multiple Choice

A ball is thrown upward from an 80-ft tower with an initial vertical speed of 40 ft/s.If air resistance is ignored,the ball's speed when it reaches the ground will be

• A)67 ft/s
• B)1.3 \(\times\) 10² ft/s
• C)1.2 \(\times\) 10² ft/s
• D)49 ft/s
• E)82 ft/s

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Definitions:

Felsic Lava

Lava that is high in silica content, typically resulting in lighter colored rocks, such as rhyolite, and is more viscous compared to mafic lava.

Vesicular Lava

Lava characterized by a rough, bubbly texture due to the escape of gases during solidification.

Scoria Cones

Volcanic cones made up of loose, dark-colored volcanic fragments called scoria, typically formed around vents of basaltic lava.

Volcanic Ash

Fine particles of rock and volcanic glass created by explosive volcanic eruptions.