A Rock,released at Rest from the Top of a Tower,hits

question 77

Multiple Choice

A rock,released at rest from the top of a tower,hits the ground after 3.5 s.What is the speed of the rock as it hits the ground? (g = 9.8 m/s² and air resistance is negligible)

• A)34 m/s
• B)17 m/s
• C)44 m/s
• D)68 m/s
• E)​24 m/s

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Definitions:

Pluton

A body of intrusive igneous rock that solidified below the surface of the earth.

Shear Zone

A region of the Earth's crust where rocks have been deformed by shear stress, leading to the alteration of their structure and the development of foliation.

Supercontinent

A large landmass that includes more than one continental core, which in Earth's history has periodically merged and then broken apart.

Gondwana

Name given by geologists to the hypothetical combination of the southern continents into a single large supercontinent.