The mass of the earth is 5.98 x 1024 kg and the radius of the earth is 6370km. use this to find the acceleration due to gravity near the surface of the earth. (find f and then use f/m to find the acceleration) m/s2

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

What is the momentum of a 2 kg object moving at 15 meters per second

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?