Relative Velocity NEET Questions

Physics - Kinematics

Relative Velocity MCQ Questions


13.
A boat can travel at 5 m/s in still water. It moves upstream in a river flowing at 3 m/s. Speed of boat relative to ground is:
A.
8 m/s
B.
2 m/s
C.
5 m/s
D.
3 m/s
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ANSWER :
B. 2 m/s
14.
A person walks at 5 km/h on a train moving at 60 km/h (same direction). Speed of person relative to ground is:
A.
55 km/h
B.
65 km/h
C.
60 km/h
D.
5 km/h
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ANSWER :
B. 65 km/h
15.
Two trains, each moving with a speed of 30 m/s, are headed towards each other on the same straight track. The speed of one train as observed from the other is:

NEET - 2022

A.
0 m/s
B.
30 m/s
C.
60 m/s
D.
90 m/s
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ANSWER :
C. 60 m/s
16.
A river flows east at 4 m/s. A boat can do 5 m/s in still water. To go straight across (perpendicular to bank), the boat must head at angle ΞΈ upstream where sinΞΈ =
A.
4/5
B.
3/5
C.
5/4
D.
4/3
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ANSWER :
A. 4/5
17.
Same river (4 m/s east) and boat (5 m/s in still water). For MINIMUM time to cross a river of width d, the boat should head:
A.
Directly across (perpendicular to bank)
B.
At 53Β° upstream
C.
At 37Β° downstream
D.
At 45Β° upstream
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ANSWER :
A. Directly across (perpendicular to bank)
18.
A river 100 m wide flows at 3 m/s. A boat crosses at 4 m/s perpendicular to bank. The drift (downstream displacement) when the boat reaches the other bank is:
A.
75 m
B.
100 m
C.
60 m
D.
50 m
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ANSWER :
A. 75 m