# NEWTON’S 3 - PowerPoint Presentation

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RD LAW Newtons third law is For every action there is an equal and opposite reaction Ms Carruth 7th grade science 32 students Listen Look Learn Newtons 3rd law Problem How can a horse pull a cart if the cart is ID: 510793 Download Presentation

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fin rocket newton law rocket fin law newton tube log pencil body produced gas force rectangle engine hot tape action accelerates data

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Slide1

NEWTON’S 3RD LAW

Newton's third law is: For every action, there is an equal and opposite reaction.Slide2

32 studentsListen, Look, Learn!Newton's 3rd lawSlide3

Problem

How can a horse pull a cart if the cart ispulling back on the horse in the oppositedirection with the same amount of force?

Aren't these balanced forces resulting in no acceleration?Slide4
Slide5
Slide6

In aerospace engineering, the principal of action and reaction is very important. Newton's third law explains the generation of thrust by a rocket engine. In a rocket engine, hot exhaust gas is produced through the combustion of a fuel with an oxidizer. The hot exhaust gas flows through the rocket nozzle and is accelerated to the rear of the rocket. In re-action, a thrusting force is produced on the engine mount. The thrust accelerates the rocket as described by Newton's second law of motion.Slide7

Hot gas produced by combustion of a fuel

Gas flows through rocket and accelerates to rear

Thrusting force produced

Thrust accelerates rocketSlide8

1. Carefully cut out the rectangle. This will be the body tube of the rocket. Wrap therectangle around a pencil length-wise and tape the rectangle so that it forms a tube.2. Carefully cut out the two fin units. Align the rectangle that extends between the two fins

with the end of your body tube and tape it to the body tube. Nothing should stick out past thebody tube! Do the same thing for the other fin unit, but tape it on the other side of the pencil,so you have a “fin sandwich.”3. Bend the one fin on each fin unit 90 degrees so that each fin is at a right angle to its

neighbor. When you look along the back of the rocket, the fins should form a “+” mark.

4. Using the sharpened end of your pencil, twist the top of the body tube into a nose cone.

Measure your nose cone from its base to its tip and record the length on your Data Log and on

the rocket itself

(For the Data Log, create a chart on a piece of paper with columns labeled “Rocket Length”

and “Distance Traveled.” For every attempt, fill in the log).

5. Remove the pencil and replace it with a soda straw. Blow into the straw to launch your

rocket! Record the distance it travels on your Data Log.Slide9

More materials. Make sure there is enough for all the studentsGarbage bags at each table

Designate one or two areas for testing rockets, instead of at each individuals deskSlide10

Exit TicketWhat is Newton's third law?What are three ways we use Newton's third law in everyday life?Slide11

Things to watch out for in your lessonMake sure there are no special needs children in room when conducting lesson

Make sure that you have a way to gain control over your class when neededClean upEnough materialsIf you can split up

bff’s

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By: min-jolicoeur
Views: 74
Type: Public