Inertia question :P
so i know its directly proportional to mass. so more mass=more inertia. so my teacher said that to move or stop an object you must first overcome inertia. so does that mean you must also overcome mass since its directly proportional to inertia?

Question

Inertia question :P    
so i know its directly proportional to mass. so more mass=more inertia. so my teacher said that to move or stop an object you must first overcome inertia. so does that mean you must also overcome mass since its directly proportional to inertia?

anonymous · Answer

There can be a net force of zero acting on an object but it can still be moving, basically thats what they mean by inertia. If you throw an object and theres no friction or resistance, the object will accelerate, reach a final velocity and continue in that direction at that velocity until a force acts on it.

anonymous · Answer

what about the mass? sorry i just dont get that part ...

anonymous · Answer

the tendency of an object to resist a change in its motion is related to its mass, yeah. More mass more resistance.

anonymous · Answer

The object that offers the least resistance is the object with the least inertia - and therefore the object with the least mass. assuming it starts with a net force of 0

anonymous · Answer

dont be confused by momentum, momentum is a vector quantity. mass x velocity, an objects momentum is pointed towards a direction. while inertia is scalar, it has no direction. Just a magnitude related to its mass.

anonymous · Answer

oh ok thanks alot! :)