Robins used the ballistic pendulum to measure projectile velocity in two ways.
2.
In 1742, Benjamin Robins invented the ballistic pendulum.
3.
But then they failed to reproduce the effect in a pendulum system, using a rocket-powered ballistic pendulum.
4.
As the suspended body constituted a ballistic pendulum, this measured the relative momentum of the rounds to some extent.
5.
In practice, it is often simpler to derive the gun s energy directly with a reading from a ballistic pendulum or ballistic chronograph.
6.
The ballistic pendulum is still found in physics classrooms today, because of its simplicity and usefulness in demonstrating properties of momentum and energy.
7.
They built a ballistic pendulum to measure the energy, based on how far the pendulum swung up after being struck by a projectile.
8.
Although the ballistic pendulum is considered obsolete, it remained in use for a significant length of time and led to great advances in the science of ballistics.
9.
In addition its primary uses of measuring the velocity of a projectile or the recoil of a gun, the ballistic pendulum can be used to measure any transfer of momentum.
10.
Unlike other methods of measuring the speed of a bullet, the basic calculations for a ballistic pendulum do not require any measurement of time, but rely only on measures of mass and distance.
a physical pendulum consisting of a large mass suspended from a rod; when it is struck by a projectile its displacement is used to measure the projectile''s velocity
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