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Physical ScienceGrade 6-8

Speed, Velocity, and Acceleration Answer Key

Calculate speed, velocity, and acceleration and interpret motion graphs.

Looking for Speed, Velocity, and Acceleration answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Speed, Velocity, and Acceleration Gizmo.

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Definitions

Q1.What's the difference between speed and velocity?

Answer

Speed is how fast (scalar). Velocity is speed plus direction (vector). 60 mph is speed; 60 mph north is velocity.

Q2.What's the formula for speed?

Answer

Speed = distance ÷ time.

Q3.What's acceleration?

Answer

The rate of change of velocity. Acceleration = (final velocity - initial velocity) ÷ time.

Motion Graphs

Q4.On a distance-time graph, what does a straight line mean?

Q5.On a distance-time graph, what does a flat line mean?

Q6.On a velocity-time graph, what does the slope represent?

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