*42. D In the javelin throw at a track-and-field event, the javelin islaunched at a speed of 29 m/s at an angle of 36° above the horizontal. Asthe javelin travels upward, its velocity points above the horizontal at anangle that decreases as time passes. How much time is required for theangle to be reduced from 36° at launch to 18°?

Rewrite expression for time using direction of the velocity tanθ=vyvx=v-gtvcosθit=v-vcosθitanθg

Answered: *42. D In the javelin throw at a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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During a football game Aiden kicks a ball from the ground at the 30-yard line. He gives the ball an initial speed of 20 meters per second, at an initial angle of 36.9 degrees. a. One second after the kick how high is the ball above the ground measured in feet? b. How far away will the ball land on the ground measured in yards?
1. A soccer player is positioned 100ft from a wall, which is 35ft high. The player wants the ball to clear the top of the wall and land 50ft inside the wall. If the player kicked the ball with an initial velocity of 80ft/s, then at what angle should the ball be kicked so that it travels 150ft and pass over the wall. Use g=32.2ft/s^2. a. 65.50 degrees b. 32.20 degrees c. 24.50 degrees d. 74.80 degrees
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