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



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