Problem 79. The ballistic pendulum is a simple device to measure projectile velocity v by observing the maximum angle to which the box of sand with embedded projectile swings. Calculate the angle if the 2 oz projectile is fired horizontally into the suspended 50 lb box of sand with a velocity v = 2000 ft/sec. Also find the percentage of energy lost during impact.

Problem 79. The ballistic pendulum is a simple device to measure projectile velocity v by observing the maximum angle to which the box of sand with embedded projectile swings. Calculate the angle if the 2 oz projectile is fired horizontally into the suspended 50 lb box of sand with a velocity v = 2000 ft/sec. Also find the percentage of energy lost during impact.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

**Problem 79.** The ballistic pendulum is a simple device to measure projectile velocity \( v \) by observing the maximum angle \( \theta \) to which the box of sand with embedded projectile swings. Calculate the angle \( \theta \) if the 2 oz projectile is fired horizontally into the suspended 50 lb box of sand with a velocity \( v = 2000 \, \text{ft/sec} \). Also find the percentage of energy lost during impact.

**Explanation of Diagram:**

- The diagram depicts a ballistic pendulum setup.
- A box filled with sand is suspended by a rod, which allows it to swing.
- The projectile is shown to be embedded in the box.
- The angle \( \theta \) represents the maximum swing angle of the box after impact.
- The pendulum length is indicated as 6 feet.

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