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Newton’s 2 nd Law

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Newton’s 2 nd Law. In this lesson, we will be focusing on Newton’s 2nd Law of Motion. This law is all about the connections between force , mass , and acceleration . Let’s find out more from the characters in Eureka. 3 2nd Law/Speed. 2 X. 1 X. 1 X. 2 X. The red ball has twice - PowerPoint PPT Presentation

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  • Newtons 2nd Law

  • In this lesson, we will be focusing on Newtons 2nd Law of Motion.This law is all about the connections between force, mass, and acceleration.

    Lets find out more from the characters in Eureka.

  • 3 2nd Law/Speed

  • The red ball has twice the mass of the red ballSo....if the mass is doubled, what happens to the force??

  • FORCE is proportional to MASSLets try some other masses? ? ?

  • What if both balls have the same mass, but the speeds are different.If the speed is doubled, what happens to the force?? 40 km/hr20 km/hr

  • So... FORCE is proportional to CHANGE OF SPEED....20 km/hr20 km/hr40 km/hr60 km/hr80 km/hr? ? ?

  • The amount of force needed depends on mass AND change of speedLets sum up what we know so far

    If we double mass,we ______ force

    If we double change of speedwe ______ forceReady for a brain check?doubledouble

  • 1. If you increase mass, what happens to force?A. increasesB. decreasesC. stays the same2. If you increase speed, what happens to force?A. increasesB. decreasesC. stays the same

  • 4 Acceleration 1Lets look at this idea of change of speed a little more

  • It takes time to go from zero to the top speed, so... its really the rate of change of speed were talking about.The word that means rate of change of speed is acceleration

  • This means we can write

    Newtons 2nd Law as

    force varies with mass and accelerationThe key idea of this Law can also be turned into an equation:

    Force = mass x acceleration(F=ma)

  • Fma Live 2nd LawFMA Live!

  • Force = mass x accelerationF = ma

    In an equation, changing one variable means another variable must also change.

    If...What happens to

    F = m aF?

    F = m aa?

  • Lets try some more

    If...What happens to

    1.F = m aa?

    2.F = m aa?

    3.F = m aF?

    4.F = m aa?

  • Big soccer ballBig Soccer Ball

  • Teacher in WagonTeacher in Wagon

  • AirgunAirgun

  • Mini_bikeMini Bike

  • SlingshotSlingshot

  • Plane Car Motorcycle RacePlane-Car-Motorcycle Race

  • Extras....More videos showingNewtons 2nd Law

  • NFL Football

    Science 360 - NFL Football

  • Terry Tate Football SmashTerry Tate Football Smash

  • Newton on ISSNewton on the ISS


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