Nigba ewe re, oy korin ni Kilmerton Training Institute ni Pretoria, nibi to ti kekoo fun odun mejo.ItokasiAwon olorin ara Guusu Afrika.. 
Òfin keji Newton, f=Ma, can be formulated to state that an object with a constant mass will acCelerate in proportion to the net force acting upon and in inverse proportion to its mass, an approximation which breaks down near the speed of light.. 