6. Intro to Forces (Dynamics)

When Marie pushes her desk to the right, friction between the floor and the desk acts toward which direction?

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

Including reaction time, the stopping distance of a car traveling at speed $v$ is the total distance the car travels while the driver reacts and while the brakes are applied. Which of the following expressions correctly represents the total stopping distance, given a reaction time $t_r$ and a constant braking acceleration $a$ (with $a$ positive)?

An object is hanging by a string from your rearview mirror. While you are accelerating at a constant rate from rest to 28 m/s in 5.0 s, what angle θ does the string make with the vertical? See Fig. 4–46.

An object with a mass of $3kg$ is accelerating at $2m/s^2$. What is the net force acting on the object?

Which of the following scenarios best illustrates unbalanced forces according to Newton's First and Second Laws?

Which of the following statements about a metal wire in equilibrium is correct?

According to Newton's First and Second Laws, what happens when an unbalanced force acts on an object?

Which of the following best describes an application of Newton's law of inertia ($F=ma$)?

According to Newton's First and Second Laws, unbalanced forces always result in $\_\_\_\_\_\_\_\_\_\_\_$.

When Dr. Hewitt lifts a bowling ball near his teeth and lets go for the first time, what happens according to Newton's First Law ($F=ma$)?

Who formulated the three laws of motion that form the foundation of classical mechanics?

Which statement best explains why cars can stop more quickly than motorcycles, considering Newton's First and Second Laws?

According to Newton's First and Second Laws, if you pound a feather with a hammer, what happens to the feather?