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# Science Presentation

Group Questions
by

## Alexandria Burwell

on 22 October 2012

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#### Transcript of Science Presentation

Maddie's, Alexis', and Alexandria's
Presentation What is Newton's Second Law of Motion? How does satellite motion and air resistance affect Newton's second Law of Motion? Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed. The equation:
a = Fnet/m What happens with Newton's second Law of Motion when objects speed up, slow down,or turn? How does centripetal force play a role in Newton's second Law of Motion? Speed up -The object has to have a certain direction to move in, but it also has to have a force behind the object to make it move. Slow Down-When an object first takes off it might be going fast, but it will also have a force due to friction that slows the object down. Turn-The object could be going fast, or slow, or can be going the same speed after the object has turned. Also if the object is acting on gravity the line of the object will change after it turns. I In Newtons 3rd law he stated that "The acceleration produced by net force on an object is directly proportional to the magnitude of net force,is in the same directions as the net force, and is inversely proportional to the mass of the object. Mass- is how much matter is in an object. Weight-is how heavy something is due to the gravitational pull from earth. The formula for weight is mass*acceleration due to gravity. How can we calculate these forces? Give examples. Does the center of a mass matter in movement? If so, how? What causes people to sling outwards on circular rides? How are acceleration, net force, and mass related? 1. A force pulling together all matter.
2. The force created when a high speed object changes direction 1. What is Gravity?
2.What is "G" force? For the "Fnet" you put the direction you are going. On the denominator which is the mass you put how much it weighs. Then divide it to get your acceleration.
Here is an example:
How much it wieghs: 12kg
What dirction your going: 6N
a = Fnet/m = 6N/12kg = 0.5m/5 squared Satellite motion affects Newton's second Law of Motion, because if you add more force then the object will keep going in a circular motion. Air resistance affects Newton's second Law of Motion, because as the object accelerates faster then the air resistance gets larger. Centripetal force is a force toward the center of a circle which holds the moving object in it's circular path Yes, because the center of a mass is the point in an object that moves as if all the object's mass were consentrated at that point. Circular motion is what causes people to sling outwards on circular rides. The reason why is, because your motion is constantly changing, which means you are constantly accelerating. Example: Speed up- You are in a sled and you are getting ready to go down a hill. Someone pushes you so you speed up or accelerate. Bibliography's Port,Perry.What is the difference between
Mass and Weight?.Phys Link.1995-2012.www.physlink.com.10/12/12. http://teachertech.rice.edu/ answers.yahoo.com/ What is the difference between Mass and Weight?
What is the formula for Weight?
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