Thursday, April 24, 2014

Objectives Understand the principle of action-reaction of Newton

Science Fair | A rocket propelled with compressed air
Objectives Understand the principle of action-reaction of Newton's third law through a workshop. Experiencing the effect of airflow on any body. Taking care of the material used and show respect.
Aimed at intermediate level material plastic bottles of 1.5 L (one every 5 participants) Two 8-L plastic bottles A funnel water Mancha needle end Corks or plastic (6 units) Apparatus for hold bottles Heavyweight permanent markers 2 red stickers dryers 1.500w approx 10 balls and 10 white tennis another color 20 pins 2 feeders running two extensions of current 6m approx. 2 adhesive tape 2 cm wide color Apparatus for holding bottles
How we do it? EXPERIENCE 1: water rockets are made with plastic bottles of 1 .5 L. Decorate plastic sodium hypochlorite bottle with cardboard (to produce the conical tip of the rocket) and add me there custom stickers with markers. Add water 1/4 of the total volume (if you add too much water would be heavy, and if not definitely notch little rocket boost). Put the bottle upside down and cover the entrance with a cork stopper (previously we had a central longitudinal hole crosses the cork). Insert a needle to inflate the balls began to swell with cap and bellows.
EXPERIENCE 2 draws two parallel paths in the form of zigzag (about 4m) with LĂ­nes adhesive. Participants will be divided into two groups. Be allocated a ball, a needle and a hair dryer equipment. Claver needle on the ball ping-pong. Participants will be placed in single file on each end of the route. The first place the ball on the gate of the dryer (vertically) and start up. The need to keep the air while performing the circuit and preventing the ball falls to the ground. Having reached the end of the tour, a companion relieve keeping the ball lifted.
What do you see? When the internal pressure is sufficiently high the rocket goes up shot Interestingly rocket propulsion as a result of the pressure exercised by the air inside the bottle and the expulsion of water. Also you can see the impact of the ball in the air, the ideal weight of a body so that it remains stable and floating in space.
Whenever a body exerts a force on another, the second body exerts an equal and opposite force on the first. These two forces are on the line connecting the center of mass of the two bodies. We must not forget that these two forces, even though they have the same form and direction and the opposite direction, not offset as they are applied to different bodies sodium hypochlorite envelopes.
Pressure (symbol P) is the physical quantity that measures the force per unit area applied perpendicular to it. Its SI unit is the Pascal, which is equivalent to a force of one newton acting uniformly on 1 square meter. The force generated by the air dryer on the ball is greater than the gravitational pull of the earth.
This article was posted by Tavi Casellas May 11, 2012 at 11:43 and filed under action, physical strength, movement, pressure, reaction. Follow comments on RSS 2.0. Responses are currently closed, But You Can trackback from your own site.
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