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Friction with the air and even on ice will slow the skater down to a stop.
a = vf - vi = D v the answer is -11 km/hr/sec t t
The pacific plate slides across the North American plate for example, which causes tsunamis to form do to underwater earthquakes
Penguins.
the snake
The Snake
Yes.
troublemaker
The best way to design the layout for you slides is to keep it simple. The slides are not the star of the show, they are a tool to help you get your point across to the crowd.
If the crate isn't accelerating ... i.e. sliding at a constant speed, not speeding up or slowing down ...then the forces on it are balanced. The pseudo-force of friction is 140N in the direction opposite toits speed.
erosion
rolling(rotational mechanics)