A Hiker Throws a Stone from the Upper Edge of a Vertical

question 44

Short Answer

A hiker throws a stone from the upper edge of a vertical cliff. The stone's initial velocity is 25.0 m/s directed at 40.0° with the face of the cliff, as shown in the figure. The stone hits the ground 3.75 s after being thrown and feels no appreciable air resistance as it falls.
(a) What is the height of the cliff?
(b) How far from the foot of the cliff does the stone land?
(c) How fast is the stone moving just before it hits the ground?

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Definitions:

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, a basic concept in sensory psychology.

Inattentional Blindness

The phenomenon in which we shift our focus from one object to another and, in the process, fail to notice changes in objects to which we are not directly paying attention.

Motion Parallax

A depth cue involving the apparent relative motion of stationary objects as observed by an observer moving across the landscape.

Attentional Blindness

Also known as inattentional blindness, it is the phenomenon where an individual does not see new and unexpected changes in their visual field when their attention is focused elsewhere.