Force Theory Flashcards
Define Mass
Amount of matter an object has (measure of an objects inertia. The greater the mass the harder it is the change its motion)
Define Weight
Measure of gravity’s pull on an object (It is a force)
What will happen to mass and weight when you go to the moon?
It will stay the same because mass is independent from other variables
Compare contact and field force and give an example of each
A contact force is when an object applies force through touch (shoving someone or pulling a rope) and a field force is force applies without contact (magnetism)
What is inertia
Inertia is “the tendency of an object to resist a change in motion.” (It is NOT a force and it IS a property of matter)
If the net force on an object is zero, does that mean the object is not moving?
Although it has a net force of zero it could still be moving at a constant velocity
What does net force tell yo about the motion of an object
Gives the magnitude and direction
Explain the different between mass and weight
Mass is independent and weight is dependent on mass
What is Newtons first law?
An object maintains its state of motion unless it is acted upon by net force
What is Newtons second law?
The acceleration of an object is directly proportional to the net force on an object and inversely proportional to the mass of the object
What is Newtons third law?
For every action, there is an equal and opposite reaction
Friction Force
The contact force that acts to oppose sliding motion between surface and moves parallel to the surface and opposite the direction of sliding
Normal Force
The contact force exerted by a surface on an object and moves perpendicular to and away from the surface
Spring Force
A restoring force, that is, push or pull a spring exerts on an object and moves opposite the displacement of an object at the end of a spring
Tension Force
The pull exerted by a string, rope or cable when attached to a body and pulled taunt and moves away from the object and parallel to the string, rope or cable at the point of attachment