FORCES & MOTION

1. FORCES & MOTION

2. Newtons Laws of Motion • An object at rest will stay at rest unless acted on by an outside force, and an object in motion will stay in motion unless acted on by an outside force

3. Newtons Laws of Motion • An object at rest will stay at rest unless acted on by an outside force, and an object in motion will stay in motion unless acted on by an outside force • The larger the mass of an object, the more force it takes to move that object Force = Mass x Acceleration

4. Newtons Laws of Motion • An object at rest will stay at rest unless acted on by an outside force, and an object in motion will stay in motion unless acted on by an outside force • The larger the mass of an object, the more force it takes to move that object Force = Mass x Acceleration • For every action there is an equal and opposite reaction

5. Forms of Energy

6. What is energy? • Ability to do work or cause change • Produces Warmth • Produces Light • Produces Sound • Produces Movement • Produces Growth • Powers Technology

7. Classes of Energy POTENTIAL KINETIC Stored energy or energy of position Energy of motion Motion, Electrical, Sound, Radiant, Thermal Gravitational, Stored Mechanical, Nuclear, Chemical

8. POTENTIAL ENERGY Types and Forms

9. Potential Energy Gravitational Energy – energy an object or substance has because of its position Anything “up high”

10. Potential Energy Stored Mechanical Energy – stored in an object by the application of force Must push or pull on an object

11. Potential Energy Nuclear Energy – energy stored in the nucleus of an atom Holds the atom together

12. Potential Energy Chemical Energy – energy stored in the bonds between atoms Holds molecules together

13. Kinetic Energy Types and Forms

14. Kinetic Energy Mechanical (Motion) Energy – movement of objects or substances from one place to another

15. Kinetic Energy Electrical Energy – movement of electrons NOT AN ELECTRON PARADE!

16. Kinetic Energy Sound Energy – movement of energy through substances in the form of longitudinal/ compression waves

17. Kinetic Energy Radiant Energy – electromagnetic energy that travels in transverse waves

18. Kinetic Energy Thermal (Heat) Energy – internal energy of a substance due to the vibration of atoms and molecules making up the substance

19. Energy Transfers Where is it going?

20. Energy Transfers 1 – Energy can not be created nor destroyed, only changed. • Law of Conservation of Energy • First Law of Thermodynamics 2 – Energy will always transfer from high to low. 3 – No energy transfer is 100% efficient.

21. Chemical → Mechanical , Heat , Sound Name the Transfer

22. Nuclear → Chemical Name the Transfer

23. Electrical → Thermal Name the Transfer

24. Chemical → Mechanical , Heat , Sound Name the Transfer

25. In Review • Energy does work or causes change. • Two main classes of energy: potential and kinetic.

26. Potential Energy – stored energy or energy of position • Gravitational, Stored Mechanical, Nuclear, Chemical • Kinetic Energy – energy of motion • Motion/Mechanical, Electrical, Sound, Radiant, Thermal/Heat • Energy can not be created nor destroyed, only changed. • Energy always transfers from high to low. • Energy transfers are never 100% efficient.