Question

Which of the following statement is correct in connection with projectiles?

• A. A path traced by a projectile in space is known as trajectory.
• B. The velocity with which a projectile is projected is known as velocity of projection.
• C. The angle with the horizontal at which a projectile is projected is known as angle of projection.
• D. all of the above

Hint:

The horizontal component of the velocity of projection ($u \cos \alpha$) always remains constant throughout the flight because there is no horizontal force (like air resistance) acting on it.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Projectile motion is a form of motion experienced by an object or particle (a projectile) that is thrown near the Earth's surface and moves along a curved path under the action of gravity only.

Step 2: Detailed Explanation:

• Trajectory: This is the specific parabolic curve that the object follows through the air.
• Velocity of Projection ($u$): The initial speed given to the object at the starting point.
• Angle of Projection ($\alpha$): The specific angle relative to the horizontal ground at which the object is launched. Since all three definitions are standard and correct in physics, option (D) is the correct choice.

Step 3: Final Answer:
All the provided statements regarding projectiles are correct.