Posterous theme by Cory Watilo

1.14 Plenary Answers

1.14 Plenary Answers

21 September 2011

08:50

·         Watch the video

·         Tell the person next to you examples of when you can see

·         Newton's First Law

·         Newton's Second Law

acting on the Banana



   

 

 

 

   

Answers:

·         Newton's First Law

·         Initially when the man is holding the banana, the forces on it are balanced so its velocity is constant and zero

·         Newton's Second Law

·         When the man pushes the banana the forces on it are unbalanced so it accelerates to the left

·         Newton's First Law

·         When the banana is in mid flight, the forces on it are balanced so it moves with a constant positive velocity to the left

·         Newton's Second Law

·         When the banana hits the man's teeth the forces on it are unbalanced so it accelerates to the right (ie. it decelerates)

·         Newton's First Law

·         When the man catches the banana, the forces on it are balanced so its velocity is constant and zero