Alice and Tom Dive from an Overhang into the Lake

question 29

Multiple Choice

Alice and Tom dive from an overhang into the lake below.Tom simply drops straight down from the edge,but Alice takes a running start and jumps with an initial horizontal velocity of 25 m/s.Neither person experiences any significant air resistance.Compare the time it takes each of them to reach the lake below.

• A) Alice reaches the surface of the lake first.
• B) Tom reaches the surface of the lake first.
• C) Alice and Tom will reach the surface of the lake at the same time.

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Definitions:

Wall Rocks

The rocks surrounding an igneous intrusion or a mineral deposit.

Dikes

Vertical or steeply inclined sheet-like bodies of igneous rock that cut through sedimentary rock layers.

Intrusive Rock

Igneous rock formed from magma that cools and solidifies within the crust of the planet, creating large crystal grains.

Extrusive Rock

Igneous rock that forms on the Earth's surface as lava cools and solidifies.