Projectile motion – terminology review Which of the following statements about a projectile are correct?

Introduction / Context:
Projectile motion is a fundamental topic in kinematics. It has a standard vocabulary that appears repeatedly in physics and engineering entrance exams. This question asks you to identify the correct terminology among common definitions.

Given Data / Assumptions:

• Projectile launched into a uniform gravitational field with negligible air resistance.
• Horizontal plane as reference for angles.
• Terminology follows standard physics textbooks.

Concept / Approach:
The motion of a projectile decomposes into independent horizontal and vertical components. But irrespective of calculations, the names for path and launch parameters are fixed: trajectory (path), velocity of projection (initial speed and direction), and angle of projection (angle with the horizontal at launch).

Step-by-Step Solution:

Verification / Alternative check:
Typical formulae support the terms: for initial speed u at angle θ, the range R = u^2 sin 2θ / g and time of flight t = 2u sin θ / g are expressed using the velocity and angle of projection; trajectory y(x) = x tan θ − (g x^2) / (2 u^2 cos^2 θ) explicitly names the path as trajectory.

Why Other Options Are Wrong:

• Selecting only one statement ignores the fact that each definition is standard and correct.

Common Pitfalls:
Confusing “angle of elevation” and “angle of projection”—for projectiles at launch, they coincide when the launch point is the observer’s eye level.

Final Answer:
all of the above