Projectile Motion: Angle of Release and Trajectory

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Questions and Answers

What is the direction of the acceleration due to gravity on a projectile?

  • Vertically downwards (correct)
  • Diagonally
  • In the direction of motion
  • Horizontally

What is the maximum angle of release for which the range of the projectile is maximum?

  • 90 degrees
  • 30 degrees
  • 60 degrees
  • 45 degrees (correct)

What happens to the range of the projectile when the angle of release is increased beyond 45 degrees?

  • It becomes zero
  • It decreases (correct)
  • It increases
  • It remains the same

What is the effect of increasing the angle of release on the height of the projectile?

<p>It increases the height but decreases the range (C)</p> Signup and view all the answers

What is the relationship between the horizontal and vertical motions of a projectile?

<p>They are independent of each other (D)</p> Signup and view all the answers

What is the characteristic of the horizontal velocity of a projectile?

<p>It remains constant throughout the trajectory (A)</p> Signup and view all the answers

What is the magnitude of the vertical acceleration of a projectile on Earth?

<p>9.8 m/s² (B)</p> Signup and view all the answers

What happens to the vertical velocity of a projectile during its trajectory?

<p>It changes direction and magnitude (C)</p> Signup and view all the answers

Why does the horizontal velocity of a projectile remain constant?

<p>Because gravity only acts in the vertical direction (B)</p> Signup and view all the answers

What is the relationship between the horizontal velocity and the vertical acceleration of a projectile?

<p>They are independent of each other (A)</p> Signup and view all the answers

What is the characteristic of the horizontal velocity of a projectile throughout its trajectory?

<p>Remaining constant (A)</p> Signup and view all the answers

Which direction is the vertical acceleration of a projectile?

<p>Downward (B)</p> Signup and view all the answers

What is the effect of gravity on the horizontal motion of a projectile?

<p>It has no effect (B)</p> Signup and view all the answers

What happens to the vertical velocity of a projectile at its maximum height?

<p>It becomes zero (D)</p> Signup and view all the answers

What is the relationship between the horizontal velocity and vertical acceleration of a projectile?

<p>They are unrelated (D)</p> Signup and view all the answers

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Study Notes

Projectile Motion

  • Projectile motion is a fundamental concept in physics that describes the motion of an object in the air, subject only to the acceleration due to gravity.
  • It is a parabolic motion in two dimensions.

Horizontal Velocity

  • Horizontal velocity is the velocity of a projectile in the horizontal direction.
  • Horizontal velocity is constant throughout the entire trajectory of a projectile.
  • Gravity only acts in the vertical direction, so there is no horizontal acceleration.
  • The horizontal speed of a projectile remains unchanged, regardless of the launch angle, initial speed, or any other factors.

Vertical Acceleration

  • Vertical acceleration is the acceleration of a projectile in the vertical direction.
  • Vertical acceleration is equal to the acceleration due to gravity, approximately 9.8 m/s² on Earth.
  • The vertical acceleration is constant and affects the vertical component of the projectile's velocity.
  • The vertical velocity of a projectile changes direction and magnitude during its trajectory.
  • Before the object reaches its maximum height, the vertical velocity decreases.
  • At the projectile's maximum height, the vertical velocity becomes zero.
  • After the maximum height, the vertical velocity increases.

Key Concepts

  • Horizontal velocity is constant throughout the trajectory of a projectile.
  • Vertical acceleration is constant and equal to the acceleration due to gravity.
  • There is no horizontal acceleration, as gravity only acts in the vertical direction.

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