An object has an acceleration of 18.0 m/s/s. If the net force acting upon this object were halved (i. e., one-half of the
original net force), then its new acceleration would be
m/s/s.

Explanation:

Net Force

The Second Newton's law states that an object acquires acceleration when an external unbalanced net force is applied to it.

The acceleration is proportional to the net force and inversely proportional to the mass of the object.

It can be expressed with the formula:

Where

Fn = Net force

m  = mass

An object has an acceleration of , thus:

If the new force is halved:

F' = F_n/2, the new acceleration will be:

Substituting the given acceleration:

The new acceleration is

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.