1. Give a complete description of how we determine the mass. of the earth. Problem 2. The ladies of the moon (Rm) = 1737.0 km. 28 The mass of the moon (mm) = 7.347 * 10 kg Determine the acceleration due to gravity on the moon. (8) Problem 3 An object is filed with an initial velocity of 100 m/s, at an angle of 45 to the horizontal. as shown in the figure. y 100M/S 1750 horizontal The equation for "y", the distance above the horizontal plane, as a function of time "t" is: - y = 70.7116. - 9 (t is in sonunds, g = 9.81 m/s) Produce an equation for the vertical Velocity as a function of time. At what time 't is the vertical velocity zero?