Q. A thief is running away on a straight road in a jeep moving with a speed of $9ms^{- 1}.\ $A police man chases him on a motor cycle moving at a speed of $10ms^{- 1}$. If the instantaneous. Separation of the jeep from the motor cycle is 100m, how long will it take for the police man to catch the theif.
A) 1 s
B) 19 s
C) 90 s
D) 100 s
Explanation
(d) Relative velocity of police man w.r.t. the time$10 - 9 = 1ms^{- 1}$. Since the relative separation between them is 100 m, hence, the time taken will be = relative separation/relative velocity =100/1=100s
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.