Question

first & last name: date: physics 9 | unit 1 lesson 9 objective: i can write a scientific argument using claim, evidence, and reasoning to describe the motion of an object in dynamic equilibrium. do now the diagram below represents the motion of a student walking across a field. use this diagram to answer questions 1 - 4. 1. calculate the student’s distance. 2. calculate the student’s displacement.

Explanation:

Step1: Define distance

Distance is the total length of the path traveled. Add all the lengths.
$20 + 10+17 + 30+55 + 10+15$

Step2: Calculate sum

$20+10 = 30$, $30+17 = 47$, $47+30 = 77$, $77+55 = 132$, $132+10 = 142$, $142+15 = 157$ m

Step3: Define displacement

Displacement is the straight - line distance from the starting point to the ending point. Assume right - direction as positive and left - direction as negative.
Let's calculate the net displacement: $(20 - 10+17 - 30+55 - 10+15)$

Step4: Calculate displacement sum

$20-10 = 10$, $10+17 = 27$, $27-30=- 3$, $-3 + 55 = 52$, $52-10 = 42$, $42+15 = 57$ m

Answer:

1. $157$ m
2. $57$ m