Question
Question: From a stationary tank of mass 125000 pound a small shell of mass 25 pound is fired with a muzzle ve...
From a stationary tank of mass 125000 pound a small shell of mass 25 pound is fired with a muzzle velocity of 1000 ft/sec. The tank recoils with a velocity of
A
0.1 ft/sec
B
0.2 ft/sec
C
0.4 ft/sec
D
0.8 ft/sec
Answer
0.2 ft/sec
Explanation
Solution
According to conservation of momentum
Momentum of tank = Momentum of shell
125000 × vtank = 25 × 1000 ⇒ vtank = 0.2 ft/sec.