27.A 4.00-g bullet is fired from a 4.50-kg gun with amuzzle velocity of 625 m/s. What is the speed of therecoil of the gun?28.A 40.0-kg pack is carried up a 2500-m-high mountainin 10.0 h. How much work is done?29.VsFind the average power output in Problem 28 inWattsi.aii.Horsepower