That would not be possible, all life would cease to exist in very short order.
Sure! I was playing outside when suddenly it started raining. Suddenly, I saw a butterfly flying in the garden. The bell rang suddenly, and it startled everyone in the classroom.
Mad People.
Yes.
Technology in the Classroom An Inside Look - 2014 was released on: USA: 20 February 2014
The World of Geography Inside the Classroom - 2013 was released on: USA: 5 April 2013 (internet)
there could be friction inside the motor. there is friction on the wheels of the scooter and the ground. there is air friction when you move on a scooter.
Friction increases or decreases based on the surface changes. If a box were sliding down a smooth hill that suddenly becomes quite rough, then friction would increase. It would be the same vice versa for decreasing friction.
Chalk
they would suddenly shoot forward at extremly high speeds.
I beckoned her to come inside the classroom.
Everyone could be helping each other. Or anything that you would think as good outside a classroom, would be the same thing inside a classroom.
The balloon will expand due to the pressure in its inside. This has nothing to do with friction.