Recent content by user14245

The problem A 0.250 \operatorname{kg} block of cheese lies on the floor of a 900 \operatorname{kg} elevator cab that is being pulled upward by a cable through distance d_1 = 2.40 \operatorname{m} and then through distance d_2=10.5 \operatorname{m}. Through d_1, if the normal force on the block...

Yes, they do not vanish. But I mean they cancel out and thus they don't appear in the net force calculation. However, in this situation, the static friction force is the net force. It would have been canceled out by some other forces, if we think of the static friction force's behavior as in...

In classical textbook examples, the static friction force is used to neutralize some other force, and both two forces will vanish when we calculate the net force. For example, when we slightly push a book on the table, the book will not move because our push is neutralized by the static friction...

Thank you. Now I got it. So, to tie an object with something of mass M is not equivalent to exerting a force of Mg on it.

(I am a newbie in physics. I did not use the template when posting as this isn't really a homework question but about something that makes me confused in elementary physics). Suppose I have two objects (with masses m<M respectively) connected vertically by a wire such that the one with mass m...