Chapter 11- 3 Newtons 3 rd law. Newton’s 3 law 1. An object in motion/rest remains unless acted on by a force 2. Force= mass x acceleration. The amount.

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Presentation transcript:

Chapter Newtons 3 rd law

Newton’s 3 law 1. An object in motion/rest remains unless acted on by a force 2. Force= mass x acceleration. The amount of force needed to move an object is equal to the amount of mass in the object and how much you want to accelerate it. 3. For every action there is an = and opposite reaction

Newton’s 3 rd Law If you push on an object gravity and friction pull back on it. The forces act in pairs but always in opposite directions Forces do not act on the the same object ex swimmer pg 361

3 rd law continued The forces may be happening at the same time but may not have equal effects. Example a bouncing ball never rebounds as high as tossed down. Action/reaction is everywhere.

Momentum Momentum is how fast an object moves due to its mass. A semi has more momentum than a V w bug. To have momentum you must be moving

Momentum con’t Forumula for momentum p=mv (p stands for momentum, m stands for mass, and v stands for velocity It takes force to change Momentum

Momentum con’t Momentum is conserved or saved. It is always transferred. Like you can transfer it to heat in friction when you break or you can push a car forward when you hit it.