An object's resistance to any change in its motion is the of the object.

the choices are
a) force
b)acceleration
c)inertia

c) inertia

Explanation:

Inertia is the resitance of an object to any change in motion. It is directly related (and proportional to) the mass of the object: in fact, as we experience everyday, the larger the mass of an object, the more difficult it is to change its motion. For example: we know that it is quite easy to stop a tennis ball thrown towards us, but it is not so easy to stop a large truck travelling towards us with the same speed: in this case, we say that the truck has more inertia than the tennis ball.

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.