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Projectile Motion as an Example of Curvilinear Motion

A ball is thrown under the influence of gravity alone so that it is projectile motion. The trajectory and several positions of the ball are shown.

Use a ruler and draw accurate vectors and vector components.

(a) Draw a vector showing the horizontal component of the velocity at each location.

(b) Draw a vector showing the velocity of the ball at each location.

(c) Draw a vector showing the acceleration of the ball at each location--use a double shafted arrow (=====>).

(d) As the ball is moving up, what is the angle between the velocity and the acceleration, < 90°, = 90° or > 90°?

(g) When the ball is at maximum height, what is the angle between the velocity and the acceleration, < 90°, = 90° or > 90°?

(f) As the ball is moving down, what is the angle between the velocity and the acceleration, < 90°, = 90° or > 90°?