A projectile is launched horizontally from a height of 25m and it is observed to land 50m from the base. What was the launch velocity?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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(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.)