Sociologia

Copernicus and the moving earth
4.- what relatioship between the sun and Earth dis copernicus?
Galileo and the leaning tower
5.- what dis Galileodiscover in his legendary experiment on the leaning tower of pisa?
Galileo´s inclined planes
6.- what dis Galileo discover about moving bodies and forcein his experiments with inclined planes
7- what does it mean to say that a moving objects has inertia? Give an example
8.- is nertia the reason formoving objects maining motion, or the name given to this property?
Newton´s first law of motion
9.- cite Newton´s first law of motion
Net force10.- what is the net force on a cart that is pulled to the right with 100 pounds and to the left with 30 pounds?
11.- why do we say that force is a vectorquantity?
The equilibrium
12.- can force be expressed in units of pounds and also in units of newtons?
13.- what is the net force on an object that ispulled with 80 newtons to the right and 80 newtons to the left?
14.- what is the net force on a bag pulled down by gravity with 18 newtons and pulledupward by a rope with 18 newtons ?
15.- hat does it mean to say something is in mechanical equilibrium?
16.- state the equilibrium rule in symbolicnotation
Support force
17.- consider a book that weigh15 N at rest on a flat table.how many newton of supportforce does the table provide? What is net forceon the the book in this case?
18.- when you stand at rest on a bath room scale, how does your eight compare with the support force by the scale?