2. Good Morning! 3/1/2016 Starter: when a car (or fair ride) is going traveling around a curve it seems like there is a force pulling you. What direction does it feel like it is pulling you? Starter: when a car (or fair ride) is going traveling around a curve it seems like there is a force pulling you. What direction does it feel like it is pulling you? Today we are going to do an activity about inertia and then move on to talk about some facts around balanced and unbalanced forces. Today we are going to do an activity about inertia and then move on to talk about some facts around balanced and unbalanced forces.

3. Station 1: Cart w/ stick figure Take the cart and point it towards the black barrier with the metal spring rod pointed towards the barrier. Put the little stick figure on the cart and give it a push. Take the cart and point it towards the black barrier with the metal spring rod pointed towards the barrier. Put the little stick figure on the cart and give it a push. Put the index card on top of the cup and the penny on top of the index card. Now flick the card and record what happens below. Put the index card on top of the cup and the penny on top of the index card. Now flick the card and record what happens below. Station 2: Penny on a card

4. Now switch Those who had the car should now have the cup and visa versa. Those who had the car should now have the cup and visa versa.

5. Now answer the following questions What What did you see the penny do? did you see the Stick figure do? Why Why did the objects do this? & What does this demonstrate? The The penny was at rest and stayed at rest stick figure was in motion and stayed in motion

6. Now an illustration link link

7. Galileo and Inertia In the 1600’s, the Italian thinker Galileo Galilei stated that, whether in motion or at rest, every object resists any change to its motion. In the 1600’s, the Italian thinker Galileo Galilei stated that, whether in motion or at rest, every object resists any change to its motion.

8. Inertia This resistance is called inertia. This resistance is called inertia. Inertia is the tendency of an object to resist any change in its motion. Inertia is the tendency of an object to resist any change in its motion.

9. Sir Isaac Newton The English Physicists Sir Isaac Newton restated Galileo’s idea in the first of his three laws of motion. The English Physicists Sir Isaac Newton restated Galileo’s idea in the first of his three laws of motion.

10. Please write this down Newton’s 1st Law of Motion Newton’s first law of motion states that an object at rest will remain at rest and an object moving at constant velocity will continue moving at constant velocity unless acted upon by an unbalanced force. Newton’s first law of motion states that an object at rest will remain at rest and an object moving at constant velocity will continue moving at constant velocity unless acted upon by an unbalanced force.

11. Law of Inertia

12. Mass and Inertia The greater the mass (matter in an object) of an object, the greater the inertia. The greater the mass (matter in an object) of an object, the greater the inertia.

13. The Bullet passes through the fruit but the majority of the banana and the apple stay in the same place. This is because of their inertia

14. Net Force

15. Unbalanced Forces When there is a net force acting on an object, the forces are said to be unbalanced. When there is a net force acting on an object, the forces are said to be unbalanced. Unbalanced forces acting on an object will change the object’s motion. Unbalanced forces acting on an object will change the object’s motion.

16. Unbalanced Forces

17. Balanced Forces Equal forces acting on an object in opposite directions are called balanced forces. Equal forces acting on an object in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object’s motion. Balanced forces acting on an object will not change the object’s motion. In other words an object that isn’t moving can still have In other words an object that isn’t moving can still have forces acting on it. forces acting on it.