1. Newton's Accomplishments:
1. Observed first spectrum with prism.
2. Developed calculus to explain gravity and
Kepler's planetary motion.
3. Developed his three 'laws' of motion.
I. Objects continue at the same velocity,
unless acted on by an unbalanced force.
II. F = ma (Weight vs mass)
III. For every force there is an equal and
opposite force acting back on the actor.
4. The Universal Law of Gravitation
F = G m1m2/d2.
Gravity is a weak force (balloon demo).
5. Tidal Force:
a. Tides on earth oceans.
b. can break apart satellites.
6. Orbits.
7. Center of Mass.

2. Observed first spectrum with prism
Spectrum = spread of wavelengths
of light

3. Developed calculus to explain gravity and
Kepler's planetary motion

4. Newton’s three 'laws' of motion
—they get at the cause of changes in motion:
force.
Quotes from
Principia Mathematica:
Quotes Q

6. 1st Law: Objects continue at the same velocity,
unless acted on by a net force.
Velocity = speed plus direction
Acceleration = rate of change of
velocity

7. F= m a: force equals mass times acceleration

8. Mass is DIFFERENT from weight
Mass, m is a measure of inertia
and is the same throughout the universe
Weight is the force of gravity
on an object = mg. .

9. acting back on the actor
Newton’s Third Law:
For every force
there is an equal
and opposite force
acting back on the actor
Rg = - Rb
Every force has a ‘soulmate’!

10. The Universal Law of Gravitation F = G m1m2/d2.
Gravity is a weak force (balloon demo).
Dr. P. jumps off table.

11. Cavendish Balance—measuring the strength of gravity

12. What is the direction of gravity?
Taken at the Mystery Spot in Santa Cruz:

14. Christa MacCauliffe
—teacher killed in first space shuttle disaster.
Is she weightless on the space shuttle?

15. Tidal Force: greater gravity tug on one side than another
a. Tides on earth’s oceans.
b. can break apart satellites.

16. Miranda—moon of Uranus, broken up by tidal force?
And reformed by gravity.

17. To put something in orbit
it must be going escape velocity.
About 18,000 mph

18. Barycenter