Mechanics AFCAT Questions

AFCAT Physics

Mechanics MCQ Questions


13.
When a man jumps out of a boat to the shore, the boat:
A.
Sinks
B.
Moves away from the shore
C.
Moves towards the shore
D.
Remains stationary
馃槕 View Answer Rough Work Error
ANSWER :
B. Moves away from the shore
14.
Action and reaction forces:
A.
Cancel each other out
B.
Are not equal in magnitude
C.
Act on different bodies
D.
Act on the same body
馃槕 View Answer Rough Work Error
ANSWER :
C. Act on different bodies
15.
A man weighing 60 kg jumps from a boat of mass 240 kg with a velocity of 4 m/s. The recoil velocity of the boat is:
A.
0.5 m/s
B.
1 m/s
C.
4 m/s
D.
2 m/s
馃槕 View Answer Rough Work Error
ANSWER :
B. 1 m/s
16.
A gun of mass 5 kg fires a bullet of mass 25 g with a velocity of 500 m/s. The recoil velocity of the gun is:
A.
10 m/s
B.
1.5 m/s
C.
5 m/s
D.
2.5 m/s
馃槕 View Answer Rough Work Error
ANSWER :
D. 2.5 m/s
17.
A bird is sitting in a closed cage. If the bird flies inside the cage, the weight of the cage will:
A.
Decrease
B.
Become zero
C.
Remain the same
D.
Increase
馃槕 View Answer Rough Work Error
ANSWER :
C. Remain the same
18.
The momentum of a body of mass 2 kg moving with a velocity of 5 m/s is:
A.
5 kg路m/s
B.
25 kg路m/s
C.
2.5 kg路m/s
D.
10 kg路m/s
馃槕 View Answer Rough Work Error
ANSWER :
D. 10 kg路m/s