## Relative velocity-MCQ-Basic

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 8 Basic Level Questions on relative velocity. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A 150 m long train is moving to north at a speed of 10 m/s. A parrot flying towards south with a speed of 5 m/s crosses the train. The time taken by the parrot the cross to train would be:

•  30 s
•  15 s
•  8 s
•  10 s

10 s

Q2. The speed of a boat is 5 km/h in still water. It crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water is

•  1 km/h
•  3 km/h
•  4 km/h
•  5 km/h

3 km/h

Q3. A river is flowing from east to west at a speed of 5 m/min. A man on south bank of river, capable of swimming 10m/min in still water, wants to swim across the river in shortest time. He should swim

•  Due north
•  Due north-east
•  Due north-east with double the speed of river
•  None of these

Due north

Q4. A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of 1200 with the direction of flow of water. The speed of water in the stream is

•  1 m/s
•  0.5 m/s
•  0.25 m/s
•  0.433 m/s

0.25 m/s

Q5. A moves with 65 km/h while B is coming back of A with 80 km/h. The relative velocity of B with respect to A is

•  80 km/h
•  60 km/h
•  15 km/h
•  145 km/h

15 km/h

Q6. A man crosses a 320 m wide river perpendicular to the current in 4 minutes. If in still water he can swim with a speed 5/3 times that of the current, then the speed of the current, in m/min is

•  30
•  40
•  50
•  60

30

Q7. A thief is running away on a straight road on a jeep moving with a speed of 9 m/s. A police man chases him on a motor cycle moving at a speed of 10 m/s. If the instantaneous separation of jeep from the motor cycle is 100 m, how long will it take for the policemen to catch the thief

•  1 second
•  19 second
•  90 second
•  100 second

100 second

Q8. A bus is moving with a velocity 10 m/s on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what velocity should the scooterist chase the bus

•  50 m/s
•  40 m/s
•  30 m/s
•  20 m/s

20 m/s

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