A Rock Is Thrown at a Window That Is Located

question 51

Multiple Choice

A rock is thrown at a window that is located 18.0 m above the ground. The rock is thrown at an angle of 40.0° above horizontal. The rock is released from a height of 2.00 m above the ground with a speed of 30.0 m/s. If the rock strikes the window on its upward trajectory, from what horizontal distance from the window was it released?

• A)53.2 m
• B)48.7 m
• C)71.6 m
• D)29.8 m
• E)27.3 m

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Definitions:

Zygomaticus Major

A muscle of facial expression that draws the angle of the mouth superiorly and posteriorly.

Orbicularis Oris

A circular muscle around the mouth that controls the movements of the mouth and lips.

Buccinator

A muscle of the cheek that aids in chewing and is involved in the compression of the cheeks against the teeth.

Masseter

A facial muscle that plays a major role in mastication (chewing), connecting the lower jaw to the cheekbone.