Question

A police jeep is cheaping with velocity of 45 km/h, a theif in another jeep moving with velocity 153 km/h. Police fires a bullet with muzzle of 180 m/s. The velocity it will strike the car of the thief is :

A
150 m/s
B
27 m/s
C
450 m/s
D
250 m/s

Solution

The correct option is B 150 m/sHere, we calculate the relative velocity of jeep = 153 - 45 = 108 km/h$$= 108 \times \dfrac {5}{18} = 30 m/s$$Therefore, striking speed = relative speed of bullet with respect to theif's car.= 180 - 30 = 150 m/sPhysics

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