1 / 6

Newton’s Third Law

Newton’s Third Law. Textbook: 4.5 Homework: WS - Newton’s Third Law. Newton’s Third Law. “For every action, there is an equal and opposite reaction.” “If object A applies a force on object B, object B applies an equal force on object A in the opposite direction.” F AB = -F BA.

abia
Télécharger la présentation

Newton’s Third Law

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Newton’s Third Law Textbook: 4.5 Homework: WS - Newton’s Third Law

  2. Newton’s Third Law • “For every action, there is an equal and opposite reaction.” • “If object A applies a force on object B, object B applies an equal force on object A in the opposite direction.” • FAB = -FBA

  3. Applications • Walking/Swimming/Driving • How Planes Fly • Why boxers break their hands • Recoil

  4. Ex. • Two friends (52 kg and 40 kg), are bored out of their minds, sat on chairs with wheels and started pushing each other to experience Newton’s 3rd law. • What are their respective accelerations if they exerted a force of 120 N on each other? • How far would they travel in 3.5 s?

  5. 39. Two toy ducks, attached to each other by a string, are being pulled by a very happy guy who just got them as a graduation present. The front duck is 5.0 kg and the back duck is 2.0 kg. If the happy guy pulls them with a force of 10 N and there is no friction, calculate • a) the acceleration of both ducks. • b) the tension in the string connecting duck 1 and duck 2. a. 1.4 m/s2 b. 2.9 N

  6. Challenge: • If the student in Problem 39 receives another duck of mass 1.0 kg from his grandma (he now has three ducks), and he puts the new duck at the front of the row, find • a) the acceleration of the three ducks. • b) the tension in the string connecting ducks 1 and 2. • c) The tension in the string connecting ducks 2 and 3. a. 1.2 m/s2 b. 8.8 N c. 2.5 N

More Related