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What is an object that moves through the air and is acted on only by gravity? | Projectile[span_0](start_span)[span_0](end_span)

What is the path taken by a projectile called? | Trajectory[span_1](start_span)[span_1](end_span)

What is the shape of the path taken by a projectile? | Parabola[span_2](start_span)[span_2](end_span)

A projectile flies through the air only under the influence of what? | Gravity[span_3](start_span)[span_3](end_span)

How does the vertical component of a projectile's motion relate to the horizontal component? | It is independent of the horizontal component.[span_4](start_span)[span_4](end_span)

What type of velocity and acceleration does a projectile undergo? | Constant horizontal velocity and constant vertical acceleration.[span_5](start_span)[span_5](end_span)

If a ball is dropped off a cliff at the same time another ball is thrown horizontally off the cliff, when will they land? | At the same time[span_6](start_span)[span_6](end_span)

What is the optimal launch angle for a projectile to travel the farthest distance? | 45°[span_7](start_span)[span_7](end_span)

What is the horizontal acceleration of a projectile? | 0 m/s² (Constant velocity)[span_8](start_span)[span_8](end_span)

What is the vertical acceleration of a projectile? | -9.80 m/s² (due to gravity)[span_9](start_span)[span_9](end_span)

What is the initial vertical velocity for a projectile launched horizontally? | Always 0 m/s[span_10](start_span)[span_10](end_span)

How is the velocity vector oriented relative to the path of the projectile? | The velocity is always tangent to the path.[span_11](start_span)[span_11](end_span)

When an angled projectile reaches the top (apex) of its path, what are its vertical and horizontal velocities? | Vertical velocity is 0 m/s; horizontal velocity equals the initial horizontal velocity.[span_12](start_span)[span_12](end_span)

If an angled projectile has a total flight time of 6.8 s, at what time does it reach its maximum height? | 3.4 s (half the total time)[span_13](start_span)[span_13](end_span)

What property do launch angles that are complementary share? | They give the projectile the same range (dx).[span_14](start_span)[span_14](end_span)

When a projectile is launched at an angle of 45°, how does the vertical velocity component compare to the horizontal velocity component? | The vertical component is equal to the horizontal component.[span_15](start_span)[span_15](end_span)