Final answer:
A car crossing a bridge is not an example of projectile motion because its motion is controlled by the bridge surface and does not involve a free-falling motion or a curved trajectory under the influence of gravity only.
Step-by-step explanation:
The question is related to understanding which option is NOT an example of projectile motion. Projectile motion is defined as the motion of an object projected into the air, which moves under the influence of gravity alone. It involves a two-dimensional motion where the projectile is launched into the air at an angle or horizontally, and it moves in a curved trajectory due to the gravitational pull.
Considering the given options:
- A cannonball launched off a cliff (projectile motion)
- A baseball hit by a bat (projectile motion)
- A car crossing a bridge (NOT projectile motion)
- A volleyball served over a net (projectile motion)
Out of the options provided, a car crossing a bridge does not illustrate projectile motion because the motion of the car is governed by the forces exerted by the bridge's surface, which counters the effect of gravity, resulting in no free-falling motion or curved trajectory.