Final answer:
Without additional information, we cannot determine the angle of "z" in a triangle. However, principles of projectile motion specify that the angle for maximum range is 45°, and a projectile's range is zero at an angle of 90° or 0°. These principles show how particular angles affect physical outcomes.
Step-by-step explanation:
To find the angle of "z", which is unspecified in the question, we need more context. However, based on the reference information, it appears that the question may be related to the principles of projectile motion and the angles at which various maximum or minimum conditions are met. In the case of projectile motion:
- The range of a projectile is zero when launched straight up at 90° or not moving at all at 0°.
- The optimum angle for a projectile to cover maximum distance is 45°.
- When launched on level ground, the angle that maximizes the range of a projectile is also 45°.
- The angle formed between the vectors of tangential velocity and centripetal force is 90°.
- The perpendicular component of a box's weight on an inclined plane is at a maximum when the incline is 90°.
The above examples illustrate how specific angles can determine the outcome of different physical scenarios. Without further specifics about the triangle and angle "z", we cannot determine which of the given options (a) 60°, (b) 90°, (c) 120°, or (d) 45° is correct.