1 What are the 3 laws of motion and gravity?.Notice that different size balls leave different size craters. Balls the same size as the others made out of crinkled up tissue paper.ĭrop the balls into the cake pan.Different size small balls (marbles, ball bearings, etc.). Flour or sand in the cake pan (about 1 inch deep).If you don’t have marbles, this can be done with larger balls and a meter stick or broom handle (without the broom.) Kick the stick and send the two balls accelerating. The lighter object will accelerate faster, hence go further. The same amount of force is applied to both. Take two marbles or small balls of different mass. What does this mean? The harder the force, the greater the acceleration (change in speed over time.) Force and acceleration are proportional to each other. The force is equal to the product of mass and acceleration. When a force acts on an object with mass, the object will accelerate in the direction of the force. Whenever you apply force to an object, it doesn’t just move. You learned about acceleration in MatchCard #6. The second law of motion describes how the force is proportional to the mass of the object and acceleration. But since the amount of force is the f ocus of the second law, let’s call attention to it. While playing, point out that sometimes the object is thrown with greater force in order to make it go further or faster. Let’s start this session with a game of catch. Introduce the 2nd Law with A Game of Catch If you played soccer or volley ball in outer space, your ball WOULD keep going forever in the same direction until another force acted on it.Ģnd Law - Force Equals Mass X Acceleration Friction from the surface of the ground.It turns out that there ARE forces working on the ball, even if you aren’t one of them. But will it continue to move forever if no one hits it? (Give time to think of why the ball stops.) You know if you hit a moving ball it will change directions according to the direction of the force applied. If it is too cold to go outside, consider playing inside with:Įverytime someone hits or kicks the ball, they should yell “force.” Without the “force,” inertia is not going to let the ball move in a different direction.Īccording to Newton’s first law, inertia should keep the ball moving forever until another force acts on it. Let’s put this first law of inertia to work as we play a quick game of soccer or volley ball. At the same time, marbles that were moving in one direction continued to do so until a force acted upon it that either stopped the motion or changed the direction. Because of inertia, unmoving marbles stayed at rest until they were hit by another marble. We already learned about inertia in MatchCard #3. Newton’s first law describes something that seems almost obvious: nothing is going to move unless a force acts on it. After the first several turns, start using the word "force" and "acceleration" as they play.Īfter the game is over, tell the students that Newton's 3 laws of motion will help explain the movement of the balls in the game.ġst Law - Law of Inertia An object will continue in its direction and velocity unless it is acted on by an outside force. The winner is the person with the most marbles.Īllow the students to play the game as an introduction to the laws of motion. Their turn ends when their shooter does not send a marble out of the circle. When players send one of the regular marbles out of the circle, they get to keep that marble, and take another turn. The first player starts with his/her marble outside of the circle, and "shoots" the shooter by propelling it with the thumb towards a marble. Each player has one shooter (large) marble. Have an odd number of marbles randomly spread around the circle. Draw a circle on the floor or in the dirt. Here's a simple and common game of marbles. Before using the MatchCard, let the students play a game of marbles. Sports and games with balls are a practical way to study Newtons 3 laws of motion. You can find more information on MatchCard Science below. This is MatchCard #7 of the Force and Motion Unit Study. Projects: Play marbles, soccer, or other ball games to demonstrate the 3 Laws of Motion.ĭownload and Use Newtons Three Laws MatchCard Students will identify the three different laws of motion and place the descriptions and examples in the correct box. Objective: Explain Newtons Three Laws of Motion and give examples. Classical Childrens Books Find A Book Your Child Will Love
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