You're on a skateboard, moving very fast but at a constant speed. Are you accelerating? Explain.

Lara Claims that if an object is accelerating, it must be moving. She also claims that if an object is not accelerating, it must be at rest. Is lara correct? Explain.

Is a dog chasing it's tail accelerating? Explain.

Which one is accelerating?

An airplane moving at a constant speed of 500 miles per hour in a straight line

A race car rounding a corner at a constant speed of 200 miles per hour.

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  1. acceleration means change in velocity, either in speed or direction.

    0 is a perfectly good velocity.

    So, what do you think now?

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  2. No you are not because,you are not turning in any direction or changing speed.

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