An object has two horizontal forces acting in opposite directions: $12N$ to the right and $7N$ to the left. Taking right as the positive direction, what is the net force on the object?

In the context of Newton's First and Second Laws, which statement best defines an unbalanced force acting on an object?

In Newton's Second Law, acceleration is given by $a=\frac{F}{m}$. On which two variables does acceleration depend?

According to Newton's laws, if the net force on an object is balanced (i.e., $\sum F=0$), what is the resulting acceleration of the object?

In Newtonian mechanics, which force is responsible for producing the acceleration of an object according to Newton's second law?

According to Newton’s second law, how does an object’s acceleration depend on the net force acting on it (for constant mass $m$)?

According to Newton's Second Law, if the net force $F_{net}$ on an object is held constant, how does increasing the mass $m$ affect the acceleration $a$?

According to Newton's first law, what does the law describe?

A $100\mathrm{kg}$ rock is in space, far from any planets, stars or black holes. It is moving in a straight line at a constant $\mathrm{10,000}\mathrm{m}/\mathrm{s}$ relative to our sun. What total force is required to keep it moving that fast?