Force is equal to the product of mass and acceleration, where the acceleration is that due to gravity, the correct term is weight.
Thy nit has been picked.
As for the inverted question marks, they are inserted using the same method as all other Ș¶ÉҪ¡∆Ļ Â©Ҥ∆ЯÂĈ†∑® $Þª/\/\.