define challenge?....●_●
define force!....

Answers
an objection to something as not being true, genuine, correct, or proper or to a person (as a juror) as not being correct, qualified, or approved. 2 : a call or dare for someone to compete in a contest or sport. 3 : a difficult task or problem Memorizing the poem was a challenge.
In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.
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Answer:
In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.