I need help with part C and part D. Thank you! HW3 Begin Date: 9/7/2018 12:01:00

Question

I need help with part C and part D. Thank you!

HW3 Begin Date: 9/7/2018 12:01:00 AM -- Due Date: 9/14/2018 11:00:00 AM End Date: 12/14/2018 11:59:00 PM (10%) Problem 3: west Suppose you first walk 10.5 m in a direction 20.0° west of north and then 22 m in a direction 40.0° south of 25% Part (a) How far are you from your starting point in meters? R 20.9 Correct! 25% Part (b) what is the angle in degrees, of the compass direction of a line connecting your starting point to your final position measured south of west? -1 1.8 Correct! 25% Part (c) Repeat part (a), but for the second leg you walk 22 m in a direction 40.0° north of east Grade Summary Deductions Potential R' 12.6 0% 100% tan0 acos0 sin 78 9HOME Submissions Attempts remaining: 2 cotan0asin0 % per attempt) detailed view atan) acotan)sinh(0 cosh0nh0 cotanh0 0% 0

Explanation / Answer

part C)

for the net displacement

Dnet = 10.5 * ( - sin(20) i + j * cos(20)) + 22 * (cos(40) i + j * sin(40))

Dnet = 13.3 i + 24 j

distance from starting point = sqrt(13.3^2 + 24^2)

distance from starting point = 27.44 m

part D)

for the this motion

Dnet = 10.5 * (- cos(40) i - j * sin(40)) + 22 * (sin(20) i - j * cos(20))

Dnet = -0.52 i - 27.2 m

Dnet = sqrt(0.52^2 + 27.2^2)

Dnet = 27.3 m

the distance from starting point is 27.3 m

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