Question

1.which of newtons law describes inertia?
2.which of newtons laws implies that it takes more force to accelerate a heavy object than a light object?
3.what force could cause a moving object to stop?
4.what is the mathematical formula that describes newtons second law?

Answer 1

1. Newton's First Law.
2. Newton's Second Law.
3. a force whose direction is opposite to the direction of motion
4. a = F/m or F = ma (same equation, just rearranged).

This could help:
http://en.wikipedia.org/wiki/Newton's_laws_of_motion

Answer 2

1.newton's first law
2.newton's second law
3. friction.
4. F= ma

Answer 3

In fact the mathematical formula for Newton's second law is
\[F=d(mv)/d(t)\]
If m is constant then it becomes
\[F=m \times d(v)/d(t)=m \times a \]
Force is the derivative of momentum.