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What is acceleration?Changing Velocity: Rate of change of velocity.
What is average acceleration?Changing Velocity: Change in velocity divided by elapsed time.
What are acceleration SI units?Changing Velocity: m/s².
Does negative acceleration always mean slowing?Changing Velocity: No; compare acceleration with velocity direction.
Can an object speed up with negative acceleration?Changing Velocity: Yes, when its velocity is also negative.
What is instantaneous acceleration?Changing Velocity: The rate of velocity change at an instant.
What are acceleration units?Changing Velocity: m/s² in SI.
What is velocity–time slope?Acceleration Graphs: Change in velocity divided by elapsed time.
What does a horizontal velocity line mean?Acceleration Graphs: Constant velocity and zero acceleration.
What are slope units on a v–t graph?Acceleration Graphs: m/s².
When does reversal occur on a v–t graph?Acceleration Graphs: When velocity crosses zero and changes sign.
What does velocity–time slope give?Acceleration Graphs: Acceleration.
What does velocity–time area give?Acceleration Graphs: Signed displacement.
What does acceleration–time area give?Acceleration Graphs: Velocity change.
What extra value is needed to reconstruct position?Acceleration Graphs: Initial position.
What is ideal free fall?Constant-Acceleration Calculations: Motion under gravity alone with negligible air resistance.
What is g near Earth’s surface?Constant-Acceleration Calculations: About 9.8 m/s² downward.
What is vertical velocity at the peak of a toss?Constant-Acceleration Calculations: Zero for an instant.
What is acceleration at the peak?Constant-Acceleration Calculations: Still downward, approximately g under the model.
When do the standard constant-acceleration equations apply?Constant-Acceleration Calculations: When acceleration is constant over the interval.
What is g near Earth in this course?Constant-Acceleration Calculations: Approximately 9.8 m/s².
What must a sign convention specify?Constant-Acceleration Calculations: The chosen positive direction.