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Q 3.18 A police van moving on a highway with a speed of 30 km h-1 fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 km h-1. If the muzzle speed of the bullet is 150 m s-1, with what speed does the bullet hit the thief’s car ?
Answers (1)
Muzzle speed of the bullet is VB=150 m s-1=540 km h-1
Speed of the Police van is VV=30 km h-1
Resultant Speed of the bullet is V=540+30=570 km h-1
Speed of the thief's car= VT=192 km h-1
The speed with which the bullet hits the thief's car=V-VT=570-192=378 km h-1 =105 m s-1
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