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Mission VP7 The Nature of a Projectile

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 The Question

Which of the following objects are projectiles?

 Define Help

Definition of a Projectile:
A projectile is an object for which the only force acting upon it is gravity. The force of air resistance is negligibly small or nonexistent for a projectile.

 Think About It

A projectile is an object upon which the only force is gravity. As such, the answer to this question would be any collection of choices which would describe an object upon which the only force is gravity. If an object is supported by a surface, then there is a normal force acting upon it and the object is not a projectile. If an object is encountering significant air resistance, then it is not a projectile. Any object experiencing any force other than gravity is not a projectile.

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