what is the best expriment to show the resisting force of inertia?

Answer 1

put your car in neutral, and ask a friend to try and stop it with his hands.

Answer 2

Dangle a mass m at rest from a coiled spring. Now yank the spring suddenly upward. The spring will start to stretch some delta length before the mass at its end moves upward. That stretch is caused by the inertia of the mass at rest. According to one of Newton's laws, a mass at rest will remain at rest (due to its inertia) until acted on by an external force.

Or, hang a bolt by a string from a nail on the open top of a drinking glass so the bolt is hanging somewhere close to the middle of the glass. Let the bolt hang without moving, then suddenly jerk the glass to one side.

The bolt will clank against the side of the glass away from the direction you jerked it. Again, inertia is at work. You accelerated the glass, but the bolt stayed put because of its inertia; so the moving glass ran into the bold.

Answer 3

I like the car idea. But instead of putting it in neutral, just dump the throttle from a standstill. Record the time elapsed before the tires grip, and the speed.

Answer 4

Set a brick on a smooth surface and pull it with a spring scale.

Compare the initial reading needed to get the brick moving compared to the reading once it is being pulled steady.