Through an experiment on the roof of a building with height of 44.145 meters the roof with made of steel a ball of copper (50 kg) was pushed by a force 1000 N till the edge of the roof fir a distance of 3 meters. Find the horizontal distance for the ball that will be travelled away from the building?

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?