A 150lb man stands at the rear of a 250lb boat which is pointed towards the pier. The distance from...

Question

A 150lb man stands at the rear of a 250lb boat which is pointed towards the pier. The distance from the man to the pier is 30ft, and the length of the boat is 16ft. What is the distance of the man from the pier after he walks to the front of the boat at a velocity of 3mph? Assume no friction between the boat and the water.

Robert · Accepted Answer

Question: 
A 150lb man stands at the rear of a 250lb boat which is pointed towards the pier. The distance from the man to the pier 
is 30ft, and the length of the boat is 16ft. What is the distance of the man from the pier after he walks to the front of the 
boat at a velocity of 3mph? Assume no friction between the boat and the water. 
Solution: 
This question is the application of third law of Newton 
“Every action has its equal and opposite Reaction” 
In this Question Action is done by the man who is pushing the boat to go forward. Since there is no friction between 
Water and Boat hence boat will start moving back with same force applied by the man.

A 150lb man stands at the rear of a 250lb boat which is pointed towards the pier. The distance from the man to the pier is 30ft, and the length of the boat is 16ft. What is the distance of the man...

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