Why Does a Glass Move Outward When Opening the Fridge Door?

[jbriggs444]

Please, PLEASE let's stay in the good old Newtonian inertial reference frame when discussing the most basic principles of mechanics.

There is more than one Newtonian inertial reference frame. Newton's laws do not pick out a preferred frame. The first law picks out a class of inertial reference frames, not a single frame.

 

[Orodruin]

Please, PLEASE let's stay in the good old Newtonian inertial reference frame when discussing the most basic principles of mechanics.

Nobody said anything about non-inertial frames. Just two different inertial frames. All you are really doing in this thread is showing off a seemingly quite lacking grasp of classical mechanics discussing with people who do understand it in quite great detail.

 

[Ibix]

Please, PLEASE let's stay in the good old Newtonian inertial reference frame when discussing the most basic principles of mechanics.

There's an inertial frame where the foot is at rest the instant before contact and another where the ball is at rest. And another where the ball is at rest after contact and another where the foot is at rest. And an infinity of frames where neither is ever at rest. There are infinitely many where the foot slows down and infinitely many where it speeds up.

Nobody needs to invoke non-inertial frames to pick a frame where the foot increases or decreases speed.

 

[PeterDonis]

Thread closed for moderation.

 

[Dale]

After discussion this thread will remain closed