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Physics I (Mechanics) quizzes

How objects move, how forces change their motion, and how energy and momentum help explain everyday mechanics.

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Physics I (Mechanics): Kinematics in one and two dimensions · Displacement, Velocity and Acceleration

How displacement, velocity and acceleration differ, how to read them from motion graphs, and why average speed and average velocity often disagree.
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From Physics I (Mechanics): Kinematics in one and two dimensions · Displacement, Velocity and Acceleration

Strictly speaking, what does a car's speedometer display?

Average speed over the trip
Instantaneous velocity
Instantaneous speed

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Answer: Instantaneous speed

It shows how fast the car is going right now but says nothing about direction, so it gives speed, not velocity.

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