6. Intro to Forces (Dynamics)

Two blocks, A and B, with masses $m_A$ and $m_B$ respectively, are in contact on a frictionless horizontal surface. A constant horizontal force $F$ is applied to block A, pushing both blocks to the right. What is the magnitude of the force that block A exerts on block B?

Stopping a vehicle with good brakes from $20\mathrm{miles}/\mathrm{hour}$ under good conditions requires about how many feet of stopping distance?

According to Newton's First and Second Laws, if a truck and a car are both moving at the same speed $v$ and apply the same braking force $F$, how does the stopping distance of the truck on a wet road compare to that of the car?

Which of the following correctly describes Newton's First and Second Laws of Motion?

A constant net force acts on an object. Which of the following best describes the object's motion?

According to Newton's First and Second Laws, if a wheel initially rotating clockwise is instead set to rotate counterclockwise with the same magnitude of angular velocity $\omega$, how does this reversal affect the net torque $\tau$ required to bring it to rest in the same amount of time $t$?

According to Newton's First and Second Laws, if an approaching train is near enough to be a danger, what should a person standing on the tracks do to avoid injury?

A $3.0\mathrm{kg}$ object is acted upon by two forces: $F{1}_1$ = $10\to$ $N$ to the right and $F{2}_2$ = $4\leftarrow$ $N$ to the left. What is the magnitude of the object's acceleration?

According to Newton's First and Second Laws, how much damage a shock causes depends on which three factors?

Which of the following can cause a moving object to change its direction: $gravity$, $inertia$, both, or neither?

Which of the following best describes a $\mathrm{newton}$?

According to Newton's First Law, when you change directions or speed too rapidly, the inertia of the vehicle will cause it to become:

According to Newton's First Law, what happens to an object when the net force acting on it is $0$?

Which method will correctly determine whether the forces on an object are balanced or unbalanced?

A block of mass $m$ slides on a frictionless horizontal surface. If a constant horizontal force $F$ is applied to the block, what is the acceleration of the block?