A Projectile Starts at the Coordinate Origin,where the Displacement Vector

question 55

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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