A proton moving at 2.44 x 10^5 m/s elastically collides with the helium nucleus which is primarily at rest. Suppose that all of the motion is in one dimension. Find out the speed and direction of motion of each body subsequent to the collision.
Note: Mass of a proton (that is, hydrogen nucleus) = 1.673x10^-27 kg
Mass of helium nucleus = 6.645x10^-27 kg