A Projectile Starts at the Coordinate Origin, Where the Displacement

question 46

Multiple Choice

A projectile starts at the coordinate origin, where the displacement vector also originates. The initial velocity, v0, makes an angle θ0 with the horizontal where 0 < θ0 < 90°. At the instant when the projectile is at the highest point of its trajectory, the displacement, velocity and acceleration vectors are , and . Which statement is true?

• A) is parallel to .
• B) is perpendicular to .
• C) is parallel to .
• D) is perpendicular to .
• E) is perpendicular to .

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Definitions:

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