PHY 101 Module 2 mastery

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School

Colorado State University, Global Campus *

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Course

101

Subject

Physics

Date

Oct 30, 2023

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docx

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5

Uploaded by DeanKoupreyMaster3532

Question 1 2/2pts Amarble is dropped from a toy drone that is 25 m above the ground, and slowly rising with a vertical velocity of 0.8 m/s. How long does it take the marble to reach the ground? 2345 Correct, the time of light for an object in free fal that has an initial vertical velocity can be determined by an application of the one-dimensional kit matic equations Question 2 22 An obiect s dropped from rest out of the window of a building, and the time to hit the ground is found to be 5 seconds. The same object is then dropped from rest out of a window twice as high above the ground as the original window. The time it takes the object to hit the ground i closest to 7s Correct, the time of light for an object dropped from rest, and in free fal is proportional to the square root of the height from which it was dropped
Question 3 2/2pts Aprojectie s launched from the ground with an initial speed of 20 m/s at an angle of geabove the horizontal. What is the horizontal component of this projectile’s velocity the instant before it strikes the ground? 1813ms Correct, the horizontal component of the velocity, which is obtained by multiplying the iitial speed by the cosine of the angle, is constant throughout the entire trip for projectile motion. Question 4 2/2pts Apotatois shot out of cylinder at an angle of 1 above the horizontal with an initial speed of 20 m/s. What is its maximum height? 175m Correct, the maximum height of a projectile can be found by finding the vertical component of the initial velocity, and then using the time-independent kinematic equation for vertical motion.
Question 5 2/2pts Aprojectil s launched from the ground at an angle of 3g-above the horizontal with an initial speed of 30 ms. It lands at a height 10 m above the ground. How long was the projectile in the air? 2535 Correct, the time of light for general projectile motion can be found by analyz motion. 8 the vertical Question 6 2 Abullet accelerates from rest to 300 m/s over a distance of 5 cm. How long did the acceleration last? Correct. the acceleration can be related to the velocity of the bullet and its stopping distance via the one-dimensional kinematic equations.
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