Resources+for+Inertia

= = =Questions := =1.- What does the Word inertia mean?=

=Sluggishness, laziness, indolence,idleness= = = = = =2.- What does the word mean in Physics?= =The resistance of an object to change its position.=

="An __object at rest stays at rest__ and an __object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force."__ Objects tend to "keep on doing what they're doing." In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as **inertia**.=

=3.- All the objects have the same inertia?.......No.......... Explain your answer with one example. It depends on the mass, the rock has more inertia than the flower.=

=4.- Explain the example of different coins= =Imagine that we apply the same force to every coin= =What forces stop the coins to spin?: The friction of the coin with the table and the friction of the coin with the air.=

=QUIZ TIME ABOUT A UNIVERSE OF MATTER AND ENERGY= =Say whether the following sencentes are TRUE OR FALSE?= =a) A material system has precise boundaries or limits.......= =b) The mass of a body is the physical magnitude that measures its inertia......= =c) As the mass of a planet increases, the gravitational force of attraction gets smaller.....= =d) Mass is the physical magnitude that measures how big a body is....= =e ) The unit of volume in the SI is the litre=

=a) False, a material system does not have defined limits= =b) True= =c) False, as the mass of a planet increases, the gravitational force of attractionn gets bigger= =d) False, mass is the measure of inertia that an object has. Mass and weight are two different terms. Weight refers to the gravitational force exerted of an objec (unit in Newton) and mass refers to the ability of the object to resist changes in velocity ( mass in Kilograms).= =e) False,The unit of volume is the cubic metre=