The change in position along a certain direction is _____ . (21) The slope of the distance -time graph gives _____ . (22) The grater the slope of a straight line distance-time graph , the _____ is the

The symbol of density is ρ and it is a …….. quantity. (23) The SI unit for pressure is …….. . (24) The total momentum of an …….. system is constant. (25) The product of mass to velocity is ……… . (26) The