Kinematics Question 310
Question: A police jeep it’s chasing with, velocity of 45 km/h a thief in another jeep moving with velocity 153 km/h. Police fires a bullet with muzzle velocity of 180 m/s. The velocity it will strike the car of the thief it’s [BHU 2003; CPMT 2004]
Options:
A) 150 m/s
B) 27 m/s
C) 450 m/s
D) 250 m/s
Show Answer
Answer:
Correct Answer: A
Solution:
Effective speed of the bullet = speed of bullet + speed of police jeep $ =180\ m/s+45\ km/h=(180+12.5)\ m/s=192.5\ m/s $ Speed of thief ’ jeep $ =153km/h=42.5m/s $ Velocity of bullet w.r.t thief ’ car $ =192.5-42.5 $ =150m/s
