Newton’s second law
description
Transcript of Newton’s second law
![Page 1: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/1.jpg)
Newton’s second law
Section 3.1
![Page 2: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/2.jpg)
Warm up
What is acceleration?
How do we calculate acceleration?
![Page 3: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/3.jpg)
Acceleration
An unbalanced force causes an object to accelerate.
![Page 4: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/4.jpg)
What type of force is
represented in each of the
following figures?
![Page 5: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/5.jpg)
![Page 6: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/6.jpg)
The acceleration of an object is directly proportional to the net force
acting on the object…..…… the acceleration of an object is inversely proportional to the mass of
the object.
![Page 7: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/7.jpg)
Relating net force, mass and acceleration…..
![Page 8: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/8.jpg)
Newton’s second law of motion
Acceleration = Fnet
mass
![Page 9: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/9.jpg)
![Page 10: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/10.jpg)
Calculate the acceleration of the rock
![Page 11: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/11.jpg)
Calculate acceleration
![Page 12: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/12.jpg)
Calculate acceleration
![Page 13: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/13.jpg)
Relation between acceleration and forces
Large Force = Large Acceleration
Fa
![Page 14: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/14.jpg)
In other words….
![Page 15: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/15.jpg)
In other words…..using the same amount of force….
![Page 16: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/16.jpg)
Application ….
1- If the mass of a helicopter is 4500 Kg, and the net force on it is 18000N, what is the helicopter’s acceleration?
![Page 17: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/17.jpg)
Application
2- what is the net force with a mass of 900 Kg if its acceleration is 32.0 m/s2?
![Page 18: Newton’s second law](https://reader036.fdocuments.in/reader036/viewer/2022070415/56814f1d550346895dbcae7e/html5/thumbnails/18.jpg)
Application
3- a car is being pulled by a tow truck. What is the car’s mass if the net force on the car is 3000N and it has an acceleration of 2.0m/s2?