Lecture Notes: Chapter 3+ Kinematics, Graphs, and Exam Prep

Q&A flashcards covering key concepts from the lecture notes on kinematics, graphs, and exam preparation.

What does a position vs. time graph show?

An object's position over time; the slope of the graph gives velocity, and changes in slope indicate acceleration.

How do you determine velocity from a position-time graph?

Calculate the slope: velocity = Δx / Δt (change in position over change in time).

What is the difference between velocity and speed?

Velocity is a vector (includes direction); speed is a scalar (magnitude only).

What is acceleration?

A change in velocity over time.

What is average velocity between two times on a position-time graph?

The change in position divided by the time interval: Δx / Δt.

If position changes from 60 m to 20 m over 1.5 s, what is the average velocity?

−40 m / 1.5 s = −26.7 m/s.

What does a horizontal velocity-time graph indicate about acceleration?

Velocity is constant; acceleration is zero.

What is the reference direction used when measuring angles for vectors in the notes?

The positive x-axis.

How should you determine the correct angle for a vector with a given direction?

Measure from the positive x-axis; depending on the quadrant, you may need to add 180° (or 270°) to place the angle correctly.

What is the purpose of equation sheets during homework and exams?

Provide equations with explanations; you can use them during homework, and you should understand what the variables mean rather than just memorizing.

What problem-solving approach is recommended for kinematics problems?

Talk the problem through to yourself; identify what the graph shows and extract information piece by piece.

What happens if you don't finish all problems in the in-class assignment?

The work is graded out of the number completed; incomplete problems are not counted, and scoring may reflect the completed portion.