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A car is travelling with a constant speed of 80km/h and passes a stationary motorcycle policeman. The policeman sets off in pursuit, accelerating to 80km/h in 10 minutesreaching a constant speed of 100 km/h after a further 5 seconds. At what time will the policeman catch up with the car?
a) Distance travelled by the car = 80,000/3600 x 10 x 60 = 1333.3 m
b) Distance travelled by police car in 10 minutes = 80,000/3600 x 5 = 111.1 m
Distance travelled by police car in ''t'' seconds = 100,000/3600 x t = 27.77t m
c) Now Distance travelled by police car = Distance travelled by car [ IN ORDER TO CATCH THE CAR DISTANCE SHOULD BE EQUAL]
d) 1333.3 = 111.1 + 27.77t
27.77t = 1222.2
t = 44.01 seconds
Thus
the policeman will catch up the car after 44.01 seconds. Plz Approve! :)
the policeman will catch up the car after 44.01 seconds.
Plz Approve!
:)
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