Motion will not change unless an unbalanced or net forceacts on it.
Unbalanced Force
Net force.
Can make an object at rest move.
Balanced Forces
Equal forces cancelling out.
This makes an object move at a constant speed or stay stationary.
The greater the mass, the greater the inertia.
The less mass, the less inertia.
When a car collides into an obstacle, it stops instantly. Due to the passengers' inertia they will continue to moveforward until they're stopped by the seatbelt, steering wheel or windshield.
Newton's First Law in action
Newton's First Law is also the law of inertia.
Inertia
The tendency to resist change.
Would the tablecloth trick work better with paper dishes?
No, it would be more difficult. The paper dishes have lessmass and therefore, lessinertia.