A student releases a marble from the top of a 140cm ramp. The marble increases speed steadily and reaches the bottom of the ramp in 4.60s. help asap

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.