A Stone Is Thrown at an Angle of 30 $\degree$ Above the Horizontal from the Top Edge of a Cliff

question 35

Multiple Choice

A stone is thrown at an angle of 30 $\degree$ above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. What is the height of the cliff? Note: g = 9.8 m/s² and air resistance is negligible.

• A) 58 m
• B) 114 m
• C) 120 m
• D) 197 m

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Definitions:

Typing Speed

The rate at which a person can type text, often measured in words per minute.

Variation

The occurrence of differences or changes in the characteristics of entities within any population, leading to diversity.

Manipulation Of Typing Speed

the deliberate adjustment or control of one's typing speed, which can be applied for various purposes, such as reducing typos or matching the pace in a typing tutorial.

Independent Variable

A variable in an experiment that is manipulated to observe its effect on the dependent variable.