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In forensics: To establish the velocity of a bullet (and thus
predict its destructive effects) the ballistic pendulum measures
the bullet's momentum. With the bullet's mass known, its velocity
can be derived.
A good website: see the ref. where the physical theory is
explained.
Errors: Beside the obvious errors of inaccuracy of measurement or
mass of the pendulum, an overestimation error can occur if one
assumes a totally inelastic collision but the projectile actually
bounces off the pendulum rather than being retained by it.
Similarly an underestimation error can occur if the projectile
passes through the pendulum since not all of its momentum is
captured.
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The motion of a pendulum is a classic example of mechanical energy conservation. A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. As the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion. Neglecting air resistance (which would indeed be small for an aerodynamically shaped bob), there are only two forces acting upon the pendulum bob. One force is gravity. The force of gravity acts in a downward direction and does work upon the pendulum bob. However, gravity is an internal force (or conservative force) and thus does not serve to change the total amount of mechanical energy of the bob. The other force acting upon the bob is the force of tension. Tension is an external force and if it did do work upon the pendulum bob it would indeed serve to change the total mechanical energy of the bob. However, the force of tension does not do work since it always acts in a direction perpendicular to the motion of the bob. At all points in the trajectory of the pendulum bob, the angle between the force of tension and its direction of motion is 90 degrees. Thus, the force of tension does not do work upon the bob.
Since there are no external forces doing work, the total mechanical energy of the pendulum bob is conserved.
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Name Date Section Data Sheet Experiment 21: Ballistic Pendulum. A. The Ballistic Pendulum Mass ofball m-9.890....
Part b & c Name Date Data Sheet Experiment 21: Ballistic Pendulum A. The Ballistic Pendulum Mass of ball m- Mass of pendulum M,-0.23 k Trial h2 (m) h1 (m) 0 0:142 Average heighthORSm Initial velocity of ball2ms 30 3 B. The Energy Lost in a Perfectly Inelastic Collision mb 0.0699 Final velocity of ball and pendalam aer the collision m/s Initial Kinétic Energy (J) ie Eaergy ) Kinetic Energy Lost AB a) C.The Determination of the Velocity of the...
Question 1: In the ballistic pendulum experiment, the velocity of the projectile was measured and recorded (vo = 6.0 m/s). The mass of the projectile was 13.0 g and the ballistic pendulum mass was 92.0 g. After the projectile is fired, it hits the ballistic pendulum, and both moved with velocity. Calculate the velocity of the projectile and the pendulum after the collision Question 2: In the ballistic pendulum experiment, the velocity of the projectile was measured and recorded (vo...
Ballistic Pendulum Version Procedure: Fire a practice shot. Locate the landing point on the floor then secure a piece of white paper to the floor (centered about the landing point). Cover the sheet with a piece of carbon paper and tape it down. 1. Shoot the ball at least 5 times. Take care not to disturb the position of the launcher during the shots. 2. Measure the vertical height H of the projectile launcher from the floor. (Use a plumb...
In the ballistic pendulum experiment (A.K.A conservation of momentum & energy), the velocity of the projectile was measured and recorded (vo = 5 m/s). The mass of the projectile was 12 g and the ballistic pendulum mass was 148 g. After the projectile is fired, it hits the ballistic pendulum, and both moved with velocity. Calculate the velocity LaTeX: vv of the projectile and the pendulum after the collision.
I put the theory on first page. 7-Ballistic Pendulum Data Studio File: "Ballistie Pendlds" Equipment List Qty Items PASCO Interface Rotary Motion Sensor Rod, 45 em Ballistic Pendulum 1Universal Table Clamp Introduction A ballistic pendulum is used to determine the muzzle velocity of a ball shot out of a Projectile Launcher. The laws of conservation of momentum and conservation of energy are used to derive the equation for the muzzle velocity. Theory The ballistic pendulum has historically been used to...
Virtual Lab: Ballistic Pendulum Introduction The ballistic pendulum was invented by Benjamin Robins in 1742 as a device mainly designed to accurately measure the speed of fast traveling projectiles (bullets or cannon balls), relying only on measurements of mass and distance, without measurements of time. Knowing the mass of the projectile, estimates of its momentum and kinetic energy could also be made. Although the ballistic- pendulum method has lost its practical importance to more modern methodologies, it was used for...
Need help With Analysis questions. Ballistic Pendulum Lab In this lab, you will explore conservation of Energy and Momentum in an inelastic collision between a projectile and a cardboard box suspended from a string. In particular, you will see that the transfer of linear momentum is easily accounted for in an inelastic collision, but the transfer of kinetic energy is not easy to measure directly. This is because Kinetic Energy in collisions transfers to vibrational, acoustic, and potential energy. Once...
Procedure: Fire a practice shot. Locate the landing point on the floor then secure a piece of white paper to the floor (centered about the landing point). Cover the sheet with a piece of carbon paper and tape it down. 1. Shoot the ball at least 5 times. Take care not to disturb the position of the launcher during the shots. 2. Measure the vertical height H of the projectile launcher from the floor. (Use a plumb bob determine the...
Problem (1) (40 points) A pendulum consisting of a ball of mass m and a massless string of length L 5.00 m is released from an angle of a 69 88 shown in the figure and strikes a block of mass M 2m. The block slides a distance D before stopping under the action of a constant friction force with the frio- tion constant μ": 0.50. The ball rebounds to an angle of Hints: Take g= 10 m/?. sin 16"...
TRIAL 1 600 2.610 9.91 o.2 0.39 2.62 43 Average Result: The average speed of the given ball is velas hralels 1) Pull the penduum to the side, insert the ball into the gun, and compress and latch the gun spring Release the pendulum so that it hangs vertically 2) Fire the gun. The pendulum will latch near the highest point of its swing. Measure ne height ha·the vertical distance from the pendulum platform to the center of the ball...