Our Dynamic Universe 4 Flashcards
1
Q
What is a projectile
A
An object which has a constant horizontal component and a changing vertical component
2
Q
What are notes on satellites
A
- satellites are projectiles that are travelling with such a fast horizontal velocity that they do not fall to earth
- the earth curves downwards a the same rate as the satellite so it never lands
- the speed of a satellites in orbit is constant
- newton thought worth. Big enough cannon and high enough horizontal velocity a cannonball would r it the earth
- a geostationary satellite has an orbital altitude of 36000km it has a period of 24hours
- geostationary satellites always appears at the same point
3
Q
What is the gravitational field strength defined as
A
The force per unit mass exerted by gravity
4
Q
What is the force exerted by gravity called
A
Weight
5
Q
Is the gravitation field strength the same on each planet
A
No
