This document discusses different types of forces and motion in physics including friction, Newton's laws, and how shape affects rolling objects. It also covers different forms of energy like electrical, voltage, current, and static electricity. Key concepts explained are what friction is, how rods roll faster than rings of the same mass due to shape, and definitions of electrical energy, voltage, current, direct current, alternating current, and static electricity.

2. Forces and Motion

3. Physics explains things that are
very, very large.

4. Physics
explains
things
that are
very, very
small.

7. is what happens when any two things rub
against each other. is a that works
against the motion of an object and acts in the
opposite direction. These can be solid things, like
your two hands rubbing together. They can also be
gases, like the friction of air slowing down your car.
Finally, friction can happen in liquids, like the
friction of the water slowing down a boat.

8. Newton’s Law

9. Boards hit bottom at same time

10. Weight (force) goes up, but so
does mass (inertia).
The two cancel out, so the two
skateboards move at the same
rate.

11. Rods roll faster than rings

12. Rods roll faster than rings

13. Do the shapes matter?
Rods roll faster than rings

14. Rods roll faster than rings

15. Rings of the same size move at
the same rate
Rods roll faster than
rings
In rolling cases, mass doesn’t
matter.
Shape does.

16. Energy is all around you!
You can hear energy as sound.
You can see energy as light.
And you can feel it as wind.

18. 18
What is Energy?

21. Electrical Energy
the force of moving
electrons.

22. Electrical Energy (electricity)
energy resulting from the force
between two objects having
different voltages.

23. Voltage
The
potential
energy of
the electrons
in a circuit.

24. Current
The
amount of
electrons
flowing in
a circuit.

25. Electricity filament

26. Electricity - electrons moving through a
metal wire.

27. D.C.
Direct Current
A.C.
Alternating Current

28. Atomic Absorption

29. Atomic Emission
Magic is technology that is
not understood.

30. A television is an Electron Gun

31. 9V
+ -
with dc voltage
Generating an Electric Field
-+

32. 9V
+ -
dc voltage
Generating an Electric Field
e-1
-+ e-1
e-1
e-1
e-1
e-1
e-1
e-1

33. Static electricity

34. Static
Electricity
when a material
has an excess or
a lack of
electrons.

37. Short circuit

38. Investigation:
What You have constructed in this activity is a simple
electrical circuit. It consist the following:
1. Source of Electric current (Dry cell)
2. Path through which current moves (Wire)
3. Appliance that uses the electricity (Bulb)
4. Switch (a device which closes or breaks the circuit)