6. Intro to Forces (Dynamics)

A salad spinner with a moment of inertia $I$ is spinning with an initial angular velocity ${\omega }_0$. If a constant frictional torque ${\tau }_f$ acts to slow it down, how long does it take for the spinner to come to rest?

According to Newton's First and Second Laws ($F_{\mathrm{net}}=ma$), how do unbalanced forces affect the speed and direction of an object?

According to Newton's Second Law, how do you calculate the net force acting on an object?

A box is being pushed across a frictionless surface by two people. One person pushes to the right with a force of $285 N$, and the other pushes to the left with a force of $185 N$. What is the net force acting on the box?

Which of the following best describes Newton's First Law of Motion?

According to Newton's First and Second Laws ($F=ma$), how does friction affect the motion of an object moving on a horizontal surface?

A box is being pushed across a horizontal surface. If the applied force is $22N$ to the right and the net force acting on the box is $18N$ to the right, what is the force of friction acting on the box?

A ball is shot vertically upward from a compressed-air gun at twice its terminal speed. Neglecting air resistance on the way up, what will be the speed of the ball when it returns to its starting point, assuming air resistance acts only on the way down and the terminal speed is $v_t$?

If the two loops in (figure 1) have equal currents in opposite directions, which of the following statements about the net force between the loops is correct?

According to Newton's First Law, if you are driving in the middle lane on a three-lane expressway and a car begins to pass you on the right, what will happen to your car's motion if you do not apply any force to the steering wheel or pedals?

Which of the following is the best example of Newton's First and Second Laws affecting your daily life?

Which of the following best explains Newton's Second Law?

According to Newton's First and Second Laws, what is most likely to happen if you stop swinging a shotgun immediately after pulling the trigger while tracking a moving target?

You can minimize the effect of $\mathrm{inertia}$ on your body while driving by: