The change of motion of an object depends on ___

A. Both the mass of the object and the size of the force

B. Only the size of the
force on the object

C. Only the weight of the object and the size of the object

D. Only the mass of the object

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)