A projectile is launched at an angle of 30. a. Is there any point on the trajectory

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A projectile is launched at an angle of 30°.

a. Is there any point on the trajectory where v(vector) and a(vector) are parallel to each other? If so, where?

b. Is there any point where v(vector) and a(vector) are perpendicular to each other? If so, where?

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