Motion Flashcards
Motion is
change in time of the position of an object
Speed =
distance/time
Velocity =
distance/time interval and direction
Acceleration =
Change in speed/time interval and direction
2 ways to affect motion
- apply force
- collision
1st Law of Motion
If no force acting on an object then its motion is “constant velocity”
2nd Law of Motion
A force acting on an object causes acceleration of the object
Force =
Mass x Acceleration
SI unit of force?
N (newton)
F = G(M1M2)/d^2
F is force of gravitational attraction
M1 and M2 are masses of two objects
d^2 is distance between centers
G is gravitational constant
Angular Momentum equation?
(mass)(orbital velocity)(radius of orbit)
Universal law of gravitation?
three
- every mass attracts every other mass
- gravitation force between two objects is directly proportional
- gravitational force follows inverse square law
Two types of energy?
- Kinetic energy
- gravitational potential energy
When an object is further from the sun the potential energy goes ___ and kinetic energy goes ___
up, down
Conservation of energy:
Total energy is always conserved
Newton generalized Kepler’s laws.
He said that the first two laws apply to not only planets orbiting the sun but
all orbiting objects
momentum =
mass x velocity
