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Answers
Answer:
6) answer is c
7) answer is b
9) answer is a
10) answer is b
11) answer is a
12)i answer is 22.3 ii answer is 5.2 iii answer is 9.8
15) answer is a
Please mark it as BRAINLIEST answer
6. (D) None of the above
When a man walks, he puts force on the ground, and in return, the ground also puts a force on the man. Due to this Newton's third law, the man is able to walk. So, this is not the option.
Similarly, for options 2 and 3, water puts a force on the pipe and the pipe puts a force on water too, resulting in the movement of water. When a gun fires a bullet, the bullet moves forward and leaves a j.erk resulting the gun to move backwards. So, option 4 is the answer.
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7. (A) W and N are action-reaction pair.
The book puts a force of W on the table, and in return the table puts a force of N on the book. (Newton's third law of motion).
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9. (C) Pulling the air from ahead from ahead by aeroplane & pushing the aeroplane by air.
The pair of aeroplane and air are not action-reaction pair. Air actually works as a friction for the aeroplane. Air is not responsible for the flight of the aeroplane.
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10. (A) 300 N
Total force = (m₁ + m₂) × g
⇒F = (20 + 10) × 10
⇒F = 30 × 10
⇒F = 300 N