Which formula describes newton’s second law of motion?

Answer;

The Formula is; F = ma; where F is the resultant force, m is the mass and a is the acceleration.

Explanation;The second Newton's Law of motion states that the resultant force of a body or object in motion is directly proportional to the rate of change in momentum.Mathematically;  F = (mv-mu)/tThis can be expressed as; F = m(v-u)/tbut (v-u)/t is the acceleration;Therefore, the equation becomes; F = ma, where F is the resultant force, m is the mass and a is the acceleration.

2. they have negligible mass.

No because a circle or pie graph usually shows percentages you'd need a line graph