Which of the following is NOT an example of Newton\'s 3rd Law: For every action
ID: 1525422 • Letter: W
Question
Which of the following is NOT an example of Newton's 3rd Law: For every action there is an equal and opposite reaction.
A pogo stick champion jumps on his pogo stick for 2 hours straight
A football offensive lineman hits a quarterback and tackles him to the ground
An ice skater pushes off the ice in order to perform a double jump
A mother pushes a stroller up a hill
A.A pogo stick champion jumps on his pogo stick for 2 hours straight
B.A football offensive lineman hits a quarterback and tackles him to the ground
C.An ice skater pushes off the ice in order to perform a double jump
D.A mother pushes a stroller up a hill
Explanation / Answer
Newton’s third law states that: For every action, there is an equal and opposite reaction.
It should be noted that action/reaction forces act on different bodies and are opposite in direction.
A) The pogo stick works with the help of spring force and gravity. When a person jumps on a pogo stick, spring compresses to gain the potential energy which converts into kinetic energy to make the person jump. Also, there is equal and opposite reaction of the force, the person applies on the pogo stick.
B) When a football offensive lineman hits a quaterback and tackles him to ground, equal and opposite force is applied to him as well which appears in form of pain to the lineman. This is, thus an example of Newton’s third law of motion.
C) In case of an ice skater, he applies a backward force to ice with his feet. In return, ice applies an equal forward force on the skater. Thus, it is also an example of Newton’s third law.
D) When mother pushes a stroller up the hill. Then, according to Newton’s third law, force applied on stroller by mother is equal and opposite to the force applied by stroller on mother. But these forces do not allow mother to move up the hill. The movement up the hill is due to combined effects of frictional force as well as gravitational force.
Hence, case (D), is not an example of Newton’s third law.
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