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Answer:
3. a leaf falling off of a tree to the ground.
Explanation:
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
Where;
- F represents force measured in Newton.
- m represents the mass of an object measured in kilograms.
- a represents acceleration measured in meters per seconds square.
Force can be categorized into two (2) main types; forces that at a distance and forces the act by direct contact with the body.
A force that acts at a distance refers to the force exerted on a body or an object without any physical contact between them such as gravitational force, magnetic force and electric force. This simply means that, there can be a push or pull between objects even when they are not in physical contact with each other due to gravitational, magnetic or electric forces.
<em>Some example of a force that acts at a distance is a leaf falling off of a tree to the ground, a magnet pulling an object to itself, a magnet pushing or repelling another magnet etc. </em>