Relative Velocity NEET Questions

Physics - Kinematics

Relative Velocity MCQ Questions


7.
Two balls are thrown toward each other from positions 100 m apart. Ball A moves at 20 m/s and Ball B at 30 m/s in opposite directions. Time for them to meet is:
A.
2 s
B.
4 s
C.
3 s
D.
5 s
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ANSWER :
A. 2 s
8.
A thief starts running at 8 m/s. A policeman starts chasing after 4 s at 10 m/s. Time taken by policeman to catch the thief after he starts running is:
A.
12 s
B.
16 s
C.
20 s
D.
8 s
πŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 16 s
9.
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
πŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 2 m/s
10.
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
πŸ˜‘ View Answer Rough Work Error
ANSWER :
B. 65 km/h
11.
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
12.
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
πŸ˜‘ View Answer Rough Work Error
ANSWER :
A. Directly across (perpendicular to bank)