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JAMB Physics 2004 Question 14

Question 14

Newton's Laws and Momentum

I. Jet-propelled aircraft II. Rocket propulsion III. The recoil of a gun IV. A person walking
Which of the above is based on Newton's third law of motion?

  1. A.I, II, III and IV
  2. B.I and III only
  3. C.I and II only
  4. D.I, II and III only.
Show the answer and explanation

Answer: A (I, II, III and IV)

Explanation

All four are action–reaction pairs: jets and rockets push gas backwards, a gun pushes the bullet forwards, and a walker pushes the ground backwards.