1 2 Suppose the distance x is given in terms of acceleration a and time t as in the following expression x = kan tm, where k is a dimensionless constant. Find m and n. Newton's law of universal gravitation is represented by F GMm = 1-2 where F is the magnitude of the gravitational force exerted by one small object on another, M and m are the masses of the objects, and r is a distance. Force has the SI units kg.m/s. What are the SI units of the proportionality constant G? 3 Using F= m a derive the unit of force 4 5 The speed of the bicycle is 25 m/s, what is its speed in km/h? A rectangular building lot has a width of 75.0 ft and a length of 125 ft. Determine the area of this lot in square meters.