 
<translate> Dị ka physics si kwuo, ka ihe na-agbagharị, ọ na-enwetakwu ọsọ. Mgbe ọ bụla ọ tụgharịrị, oge ọ na-atụgharị na-abawanye nke na-eduga ya inweta ọsọ. Ya mere, azịza ikpeazụ bụ nweta ọsọ. <eng> According to physics, as a objects rolls, it gains speed. With every rool on downside, the number of time it rools increase which leads to it gaining speed.
So, the final answer is gain speed. 