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 ms –1 , with what speed does the bullet hit the thief’s car (as, seen by thief). According to thief in the car ?
Text Solution
Verified by ExpertsA
30 km/h = 
m/s , 192 km/hr = 
m/s
Muzzle speed = velocity of bullet w.r.t. revolver
= velocity of bullet w.r.t. van
150 = V b – V v
150 = V b – 
⇒ V b = 
m/s w.r.t. ground
Now speed with which bullet hit thief's car
= velocity of bullet w.r.t car = V bc = V b – V c
= 
= 
= 105 m/s
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