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Uuuu .Cum cuyunstuntmanir.uni Google Chrome Web Stor Paycheck PANETI Watch Descendan. PANET I History O n Youtube other look WilayPLUS PLUS I Help Contact Us U S Halliday, Fundamentals of Physics, 10e Grossmont College Physics (PHYC-140-240-24 Practice Assignment Gradebook ORION Downloadable Textbook ssignment MESSAGE HY INSTRUCTOR FULL SCREEN PRINTER VERSION BACK NE Chapter 08, Problem 012 A 1.10 kg snowball is fired from a chiff 14.8 m high with an initial velocity of 18.5 ms, directed 33.00 above the horizontal (a) Using energy techniques, find the speed of the snowbal as it reaches the ground below the diff. What is that speed (b) if the launch angle is changed to 33.00 below the horizontal and (c) the mass is changed to 2.50 kg? Units (a) Number (b) Number (c) Number Units Units By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor Question Attempts of 10 used SAVE FOR LATER SUBMIT ANSWER Earn Maximum Points available only if you answer this question correctly in four attempts Polo I 2000-2019 John Wiley Sons Inc. All Rights Reserved. A Division of John Wiley & Sonses

Answer 1

here,

the mass of snowball , m = 1.1 kg

the height of cliff , h0 = 14.8 m

initial velocity , v0 = 18.5 m/s

theta = 33 degree

a)

let the speed at the bottom of the ground be v

using conservation of energy

0.5 * m * v0^2 + m * g * h0 = 0.5 * m * v^2

0.5 * 18.5^2 + 9.81 * 14.8 = 0.5 * v^2

solving for v

v = 25.2 m/s

the speed of the snowball at the bottom is 25.2 m/s

b)

when the launch angle is below the horizontal

let the speed at the bottom of the ground be v

using conservation of energy

0.5 * m * v0^2 + m * g * h0 = 0.5 * m * v^2

0.5 * 18.5^2 + 9.81 * 14.8 = 0.5 * v^2

solving for v

v = 25.2 m/s

the speed of the snowball at the bottom is 25.2 m/s

c)

the speed does not depends upon the mass of ball

so, the speed will be the same .i.e 25.2 m/s