projectile is shot upward from the surface of Earth with an initial velocity of 128 meters per second. Use the position function below for free-falling objects. What is its velocity after 4 seconds? After 10 seconds? (Round your answers to one decimal place.)

projectile is shot upward from the surface of Earth with an initial velocity of 128 meters per second. Use the position function below for free-falling objects. What is its velocity after 4 seconds? After 10 seconds? (Round your answers to one decimal place.)

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter7: Gravitation

Section: Chapter Questions

Problem 86A

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Question

A projectile is shot upward from the surface of Earth with an initial velocity of 128 meters per second. Use the position function below for free-falling objects. What is its velocity after 4 seconds? After 10 seconds? (Round your answers to one decimal place.)

s(t) = −4.9t² + v₀t + s₀

4 s	m/s
10 s	m/s

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