A physicist runs straight south at a velocity of 8mi/hr. The wind is at her back (directly from the north, relative to Earth) at a velocity of 20 mi/hr. She decides to change her course so that the wind will strike her right side (i.e. at 90-degrees relative to her motion).

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter4: Motion In Two And Three Dimensions
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A physicist runs straight south at a velocity of 8mi/hr. The wind is at her back (directly from the north, relative to Earth) at a velocity of 20 mi/hr. She decides to change her course so that the wind will strike her right side (i.e. at 90-degrees relative to her motion). By what angle must she change her direction of course?

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