Questions and Answers - Law of Conservation of Momentum

? A bullet of mass 100g firea by a gun of 10Kg tio with a speed 2000 mls wind recoil velocity. \ 2914 of gunn and edit NiBolor ans vg 201 Mby bood set sect M6 baided Y -3 7=100 XIQ x2000 10 = - -20m/s Before firing y=0 V6=0 mgvg t M6V6=0 mgvg = - M6V6 mbv6 Vg = mg Pbf = mgxo+ m6xo Pbf = 0 (before firing) Paf = mgvg +M6V6

? A gun of mass 10 kg fires 4 bullet/second . The mass of each bullet is 20g and the velocity of the bullet is 300mls. The force re- quarect to hold the gun while firing is? ans: m=10kg n= 4 mass of each bullet = 20gm so 20x4 = 80 V= velocity of the bullet? F = & X20 x 10-3x 300 = 24N ? A sateleite in a force free space sweeps stati onary inter planatary clust at a rate of am = XV The acceleration of one sateleite is ? clt ans: Sweeps dm -qv2 = RV a = at M F= V am F=ma olt ma = ap = VXXV at F= ma = xv2

F dp dL F-=01266 F=26t p=a+bt' fof

? if a borob initially at rest is explode into two fragments with masses are in the ratio 2:3 if first fragment moving with velocity 6mls towards north then what is the magnitude and direction of velocity? ans: 6mls v=? Pf = 2x6 t 3V = 23 12+3V = 0 Pi=O 3r = -12 V= -4mls