IB MYP Integrated Sciences e-Assessment : Motion and Motion Graphs Exam Style Practice Questions - New Syllabus
Question (3 marks)
If each step measures $74.0$ cm, state the total distance the student walked during the activity in part (b). You should give your answer in kilometres to three significant figures.
▶️Answer/Explanation
Ans:
$
\text{Distance} = \text{Number of Steps} \times \text{Step Length}
$
Number of Steps = \( 3927 \)
Step Length = \( 74.0 \, \text{cm} \)
$
\text{Distance} = 3927 \times 74.0 \, \text{cm}
$
$
\text{Distance} = 290,598 \, \text{cm}
$
$
1 \, \text{km} = 100,000 \, \text{cm}
$
$
\text{Distance in km} = 2.90598 \, \text{km}
$
Round to three significant figures
$\text{Distance} = 2.91 \, \text{km}$