Vectors Test

Result

Vectors Test - 31

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

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 10 m/min in still water, wants to swim across the river in shortest time. He should swim

A
Due north

B
Due north-east

C
Due north-east with double the speed of river

D
None of these

Solution
Question 3
4 / -1

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 120° with the direction of flow water. The speed of water in the stream is

A
1 m/s

B
0.5 m/s

C
0.25 m/s

D
0.433 m/s

Solution
Question 4
4 / -1

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

A
80 km/h

B
60 km/h

C
15 km/h

D
145 km/h

Solution
Question 5
4 / -1

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

A
1 second

B
19 second

C
90 second

D
100 second

Solution
Question 6
4 / -1

A man can swim with velocity v relative to water. He has to cross a river of width d flowing with a velocity u (u > v). The distance through which he is carried down stream by the river is x. Which of the following statement is correct.

A

B

C

D
Question 7
4 / -1

A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain-drops are falling vertically down. The another man standing on ground the rain will appear

A
To fall vertically down

B
To fall at an angle going from east to east

C
To fall at an angle going from east to west

D
The information given is insufficient to decide the direction of rain

Solution
Question 8
4 / -1

A motorboat covers a given distance in 6 hours moving downstream on a river. It covers the same distance in 10 hours moving upstream. The time it takes to cover the same distance in still water is

A
9 hours

B
7.5 hours

C
6.5 hours

D
8 hours

Solution
Question 9
4 / -1

A
0

B
1

C
2

D
3

Solution
Question 10
4 / -1

They sum of the magnitudes of two forces acting of point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of smaller magnitude, what are the magnitudes of forces ?

A
12, 5

B
14, 4

C
5, 13

D
10, 8

Solution