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if a police car running after a thief's car with the speed 126 km/hr if a bullet is fired from the police car with the speed of 200m/s .If the speed of police car is 36 km/hr.if the initial distance between police car and thieves car is 200 m .Find out whether bullet will hit the thief car |
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Answer» speed of thief's car = 126km/hr = 35m/s speed of police car = 36km/hr = 10m/s speed of bullet = 200m/s initial separation between thief's car and police car = 200m As the bullet was fired from a police car that was already moving with a speed of 10m/s, the speed of the bullet relative to GROUND = 200 + 10 = 210m/s Now, the relative speed of the bullet as seen by a thief in his car = 210 - 35 = 175m/s It means that if you consider the thief's car as a STATIONARY object, then the bullet approaches the thief's car with a speed of 175 m/s So, the time in which the bullet reaches the thief's car = 200/175 =1.14 seconds Thus, the bullet will definitely HIT the Thief's car. Hope it helps!! |
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