6. Intro to Forces (Dynamics)

According to Newton's First Law, rapid deceleration of the head, such as when it impacts the windshield, causes:

A $5 \mathrm{kg}$ object is accelerating at $2 m/s^2$. According to Newton's Second Law, what is the magnitude of the resultant force acting on the object?

Given two forces $f_1$ and $f_2$ acting in opposite directions along the same line, what is the magnitude of the net force $F=f_1-f_2$?

A block of mass $m$ (block 1) is at rest on a horizontal surface. According to Newton's First Law, which of the following statements best explains why the block remains at rest?

According to Newton's First and Second Laws, what must be true whenever an object is standing still?

According to Newton's First Law, if two boats are operating near each other and there is no net external force acting on them, which boat will maintain its course and speed?

If a car moves with a constant $v$ (velocity), which of the following statements is true according to Newton's First and Second Laws?

According to Newton's laws, if the current $i$ in a nearby wire is decreasing, what is the direction of the net force that the wire exerts on loop A?

A car of mass $m$ accelerates uniformly from rest to a velocity $v$ in time $t$. According to Newton's Second Law, what is the magnitude of the net force on the car?

According to Newton's First Law, what type of path does a moving object follow in the absence of a net external force?

Four masses are connected by massless, rigid rods to form a system. If the system is at rest and the net external force acting on it is zero $(F\_\{\mathrm{net}\}=0)$, which of the following statements best describes the motion of the system according to Newton's First Law?

According to Newton's First and Second Laws, what happens to an object if the forces acting on it are unbalanced?

Which of the following is a true statement about an object experiencing zero net force ($F=0$)?

Which statement best describes the difference between a balanced force and an unbalanced force according to Newton's First and Second Laws?

According to Newton's First Law, what is the tendency of a moving object when no net external forces ($F\_\mathrm{net}$) are acting on it?