e Chegg Study | Guide- Blackboard Leam XI The Expert TA | Humax Isign in to your

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e Chegg Study | Guide- Blackboard Leam XI The Expert TA | Humax Isign in to your accou X1JTSweatshirts https://usi380k.theexpertta.com/common/TakeTutorialAssignment.aspx × 1/ Northwestern Oklahc × x-G Google Watch AFC Bournem × Home Student: joshuaquansah@rocketmail.com My Account Log Out Class Management | Help Homework 10 Begin Date: 3/31/2016 5:00:00 PM Due Date: 5/2/2016 5:00:00 PM End Date: 5/2/2016 5:00:00 PM (8%) Problem 1: A student stands do-2.5 m in front of a floor-to-ceiling mirror. Her eyes are he = 1.46 m above the floor and she holds a flashlight at a distance hf= 0.85 m above the floor Randomized Variables do = 2.5 m he= 1.46 m he= 0.85 m Assignment Status Click here for detailed view 100% Part (a) Calculate the angle in degrees that the flashlight makes with respect to the floor if the light is reflected into her eyes Grade Summary 0% 100% Potential Problem Status 0 sin0 cotan asin0 acos(O atan0 acotan sinh cosh0anh cotanh0 cos Submissions Attempts remaining: 10 % per attempt) detailed view Degrees O Radians Submit Hint I give up! Hints: 0% deduction per hmt. Hmts remaining: 3 Feedback: 0% deduction per feedback. 10 12 All content 2016 Expert TA. LLC 1:53 AM I'm Cortana. Ask me anything 4/19/2016

Explanation / Answer

Here,

do = 2.5 m

he = 1.46 m

hf = 0.85 m

let the angle of flash light made with floor is theta

height of contact point above flashlight is h

as angle of reflection = angle of incidence

(y)/do = (1.46 - 0.85 - y)/do

(y) = (1.46 - 0.85 - y)

solvign for y

y = 0.305 m

theta = arctan(y/do)

theta = arctan(0.305/2.5)

theta = 6.96 degree

the angle made with floor is 6.96 degree

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