61
Question
A police jeep is 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 with which is will strike
of the car of the thief is
A police jeep is 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 with which is will strike of the car of the thief is
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Solution
The correct option is A 150 m/s
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's jeep = 153 km/h = 42.5 m/s
Velocity
of bullet w.r.t.thief's car
= 192.5-42.5 = 150 m/s
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's jeep = 153 km/h = 42.5 m/s
Velocity of bullet w.r.t.thief's car
= 192.5-42.5 = 150 m/s
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