প্ৰক্ষেপ চিনপ্ৰক্ষেপন
প্ৰক্ষেপ দোলক (Assamese)
1. A ballistic pendulum is a device for measuring a bullet's momentum, from which it is possible to calculate the velocity and kinetic energy. Ballistic pendulums have been largely rendered obsolete by modern... from wikipedia.org