A thief runs at a speed of 10m s


Asked by admin @ in Physics viewed by 1069 People


A thief runs at a speed of 10m/s. A policeman runs behind him at a speed of 12.5m/s. But after 10 seconds the policeman had started running. After how many meters will the policeman catch the thief

Answered by admin @



Answer: 500m

Explanation:

The relative speed of policeman w.r.t thief is (12•5-10)m/s

=2•5m/s

As the policeman starts running after 10 sec, the dist. covered by thief in this period =v×t

=10×10

=100m

So rel. separation=100m

Time taken by policeman to catch thief = (rel. Separation)/(rel. vel.)

= 100/2•5

= 40sec

The dist covered by policeman in 40 sec = 40×12•5

= 500m

This is the answer.


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