First slide

Relative velocity in 1-d

Question

A thief is running away on a straight road in a jeep moving with a speed of 9 ms^-1. A policeman chases him on a motor cycle moving at a speed of 10 m s^-1. If the instantaneous separation of the jeep from the motor cycle is 100 m, how long will it take for the policeman to catch the thief?

Moderate

A

1s
B

19s
C

90s
D

100s

Solution

Relative velocity of policeman w.r.t. the thief is 10 - 9 = 1 m s^-1. Since the relative separation between them is 100 m, the time taken will be - relative separation/relative velocity =100/1 = 100 s.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App