Knowledge Points

Comprehensive guides and explanations covering projectile concepts and principles.

Projectile Motion - Basic concepts and Equations of Motion

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Projectile Motion - Advanced Topics

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Browse Problems

40 problems tagged with projectile

P0298

Intermediate Mechanics › Kinematics

Projectile Launch Angles to Clear a Barrier

A projectile is launched from the ground with an initial speed $v_0$. To be successful, it must pass over a barrier of height $y$ located at a horizontal distance $x$ from the launch point.

  1. What is the minimum launch angle $\theta_{min}$ that will clear the barrier?
  2. What is the maximum launch angle $\theta_{max}$ that will clear the barrier?
projectile

P0297

Intermediate Mechanics › Kinematics

Projectile Motion Landing on a Roof

A ball is thrown, landing on a roof a time $t$ later. The landing spot is at a height $h$ above the launch point. Just before landing, the ball's path makes an angle $\theta$ with the horizontal roof. Assume the acceleration due to gravity is $g$ and that the ball is descending when it lands.

  1. Find the horizontal distance $d$ it travels.
  2. What is the magnitude of the ball's initial velocity, $v_0$?
  3. What is the angle $\alpha_0$ (relative to the horizontal) of the ball's initial velocity?
projectile

P0299

Intermediate Mechanics › Kinematics

Projectile Initial Velocity from Position Data

A projectile is launched from ground level. At a time $t_1$, its horizontal displacement is $x_1$ and its vertical displacement is $y_1$.

  1. What is the horizontal component of the initial velocity, $v_{0x}$?
  2. What is the vertical component of the initial velocity, $v_{0y}$?
  3. What is its horizontal displacement, $x_{peak}$, when it reaches its maximum height?
projectile

P0303

Intermediate Mechanics › Kinematics

Symbolic Projectile Motion from Speed Graph

A projectile is launched from ground level. A graph of its speed $v$ versus time $t$ shows an initial speed $v_0$ at $t=0$. The speed decreases to a minimum value $v_{min}$ at time $t_h$ and then increases.

  1. What is the total horizontal distance $R$ the projectile travels before returning to ground level?
  2. What is the maximum height $H$ attained by the projectile?
projectile

P0312

Advanced Mechanics › Kinematics

Locus of Projectile Trajectory Apexes

An object is launched from the same point with a constant initial speed $v_0$ but at various different projection angles. The motion occurs within a single vertical plane.

Find the equation of the curve formed by the highest points of all possible parabolic trajectories.
projectile

As shown in the figure, an object P is located at the top of a flagpole of height $h$. A boy at point O, a horizontal distance $s$ from the base of the flagpole A, shoots a small stone with a slingshot to hit the object P. The initial speed of the stone is $v_0$.

  1. What is the minimum value of the initial speed $v_0$ required for the stone to hit object P?
  2. What is the corresponding launch angle $\theta$ (the angle between the launch direction and the horizontal)?
projectile

P0314

Advanced Mechanics › Kinematics

Maximum Launch Angle for a Receding Projectile

A person throws a stone from the ground level. The stone is considered a projectile moving under the influence of gravity, and air resistance is neglected. The stone must continuously move farther away from the person who threw it throughout its entire flight.

What is the maximum initial angle of projection with the horizontal that allows this condition to be met?
projectile

P0315

Advanced Mechanics › Kinematics

Minimum Work to Kick a Soccer Ball

A soccer player kicks a ball from a penalty spot, which is located at a horizontal distance $s = 11$ m from the goal. The ball is kicked such that it passes just under the center of the crossbar, scoring a goal. The height of the crossbar from the ground is $h = 2.5$ m. The mass of the soccer ball is $m = 0.5$ kg. Air resistance is considered negligible.

Find the minimum amount of work the player must do on the soccer ball.
projectile

P0316

Advanced Mechanics › Kinematics

Product of Flight Times for Projectiles with Equal Range

Two particles are launched from the same point on level ground with the same initial speed $v_0$ but at different launch angles, $\alpha_1$ and $\alpha_2$. They move in the same vertical plane and land at the same distance R from the launch point, as shown in Figure (a). Air resistance is negligible.

Prove that when the ranges R of the two particles are the same, the product of their times of flight is directly proportional to the range R.
projectile

P0319

Advanced Mechanics › Kinematics

Projectile Trajectory Over a Double-Inclined Plane

An object is launched from the base of a triangular prism resting on a horizontal surface. The left face of the prism has an inclination angle of $\theta$ with the horizontal, and the right face has an inclination angle of $\varphi$. The object is launched with an angle $\alpha$ relative to the horizontal from the bottom corner of the $\theta$-inclined face. The trajectory is such that the object just grazes the peak of the prism and lands at the bottom corner of the $\varphi$-inclined face.

Find the relationship that must be satisfied between the launch angle $\alpha$ and the inclination angles $\theta$ and $\varphi$. Express the relationship in a simple form.
projectile

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