Newtons third law, Mechanical Engineering

Problem - Newton's Third Law

Newton's Third Law of Motion states that if two objects interact, the force F12 exerted by object 1 on object 2 is equal in magnitude and opposite in direction to the force F21 exerted by object 2 on object 1.  Mathematically, F12  = - F21.  In other words, all forces occur in an action/reaction pair ("for every action, there is an equal and opposite reaction").

Fill in the blanks in the table below.  The first row is filled out as an example.

Situation

Action

Reaction

 

Object providing the force

Force

Object acted upon by the force

Object providing the force

Force

Object acted upon by the force

You lift a box off the ground

You

100 N j

Box

Box

-100 N j

You

A tugboat pulls a ship

Tugboat

2500 N i

Ship

Ship

 

 

A Toyota collides with a Honda

Toyota

 

Honda

 

900 N i

 

You push against a wall

Your hands

130 N i

Wall

 

 

 

You push off the ground to jump

Your feet

-450 N j

The ground

 

 

 

A husky dog pulls a sled

Dog

250 N i + 200 N j

 

 

 

 

You throw a baseball

 

275 N i + 125 N k

 

 

 

 

Posted Date: 2/26/2013 4:23:08 AM | Location : United States







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