Motion Graph Practice Notes - Free Printable

I'll solve this motion graph problem step by step, analyzing the velocity-time graph to answer each question.

First, let me understand what I'm looking at:

This is a velocity-time graph showing the motion of a fly. The vertical axis represents velocity (v) in m/s, and the horizontal axis represents time (s). The graph is divided into sections labeled A through I.

For velocity-time graphs:
- Constant velocity = horizontal line (slope = 0)
- Speeding up = increasing magnitude of velocity (getting further from zero)
- Slowing down = decreasing magnitude of velocity (getting closer to zero)
- Moving right = positive velocity
- Moving left = negative velocity

Let me analyze each section:

Section A: Velocity goes from 0 to -10 m/s (moving left, speeding up)
Section B: Velocity stays at -10 m/s (constant velocity, moving left)
Section C: Velocity goes from -10 m/s to 0 m/s (moving left, slowing down)
Section D: Velocity goes from 0 to 10 m/s (moving right, speeding up)
Section E: Velocity stays at 10 m/s (constant velocity, moving right)
Section F: Velocity goes from 10 m/s to 0 m/s (moving right, slowing down)
Section G: Velocity goes from 0 to -5 m/s (moving left, speeding up)
Section H: Velocity stays at -5 m/s (constant velocity, moving left)
Section I: Velocity goes from -5 m/s to 0 m/s (moving left, slowing down)

Now I'll answer each part:

a. Sections where the fly moves with constant velocity: These are the horizontal sections where velocity doesn't change.
- Section B: constant velocity of -10 m/s
- Section E: constant velocity of 10 m/s
- Section H: constant velocity of -5 m/s

b. Sections where the fly moves right slowing down: Moving right means positive velocity, slowing down means velocity is decreasing toward zero.
- Section F: velocity decreases from 10 m/s to 0 m/s (moving right, slowing down)

c. Sections where the fly moves left speeding up: Moving left means negative velocity, speeding up means velocity is becoming more negative (further from zero).
- Section A: velocity goes from 0 to -10 m/s (moving left, speeding up)
- Section G: velocity goes from 0 to -5 m/s (moving left, speeding up)

The handwritten answers on the image are partially correct but incomplete:
- For part a, they only identified B and H, missing E.
- For part b, they correctly identified F.
- For part c, they identified A and G, which is correct.

Let me provide the complete answers:

a. Sections with constant velocity: B, E, H
b. Sections where fly moves right slowing down: F
c. Sections where fly moves left speeding up: A, G