FRICTION IS THE SURFACE RESISTANCE THAT IS RELATIVE TO MOVEMENT OR WHEN TWO OBJECTS ARE RUBBING TOGETHER. WHEN TWO OBJECTS RUB AGAINST EACH OTHER, THE MICROSCOPIC BUMPS ON THEIR TOUCHING SURFACES RUB TOGETHER, SLOWING DOWN BOTH OBJECTS VELOCITY. THE MORE MASS AN OBJECT HAS WHEN IT IS MOVING ACROSS A SURFACE, THE MORE FRICTION IT IS GOING TO HAVE ON THE GROUND WHEN BEING PUSHED OR MOVED.
RELATION TO SKATEBOARDING
SOME PEOPLE SAY THAT THE HARDEST PART ABOUT SKATEBOARDING IS STOPPING. THIS CAN BE TRUE, BUT A REAL SKATEBOARDER USUALLY HAS IT DOWN PRETTY GOOD. SOME SKATEBOARDERS TRY TO SLOW DOWN BY SLIDING THEIR SHOE ON THE GROUND WHEN THEY HAVE A LOT OF SPEED, USING THE FRICTION OF THEIR SHOE ON THE GROUND TO STOP THEMSELVES....HOWEVER THIS RUINS THE SHOE. TO PREVENT THIS, SKATEBOARDERS ALSO DO A TRICK CALLED THE POWER SLIDE WHERE THEY TURN THE SKATEBOARD SIDEWAYS WHEN GOING FAST SO THAT THE WHEELS ARE MOVING FORWARD WHILE SIDEWAYS SO THEY DO NOT SPIN BUT ACTUALLY RUB AGAINST THE GROUND CREATING FRICTION TO SLOW THE SKATER DOWN.
QUESTION #1 IF A SKATEBOARDER IS FLYING DOWN A HILL AND SEES A CAR AT THE BOTTOM, WHAT FORCE WOULD HE NEED TO USE IN ORDER TO STOP HIMSELF BEFORE HE HITS THE CAR?
ANSWER: FRICTION
QUESTION #2 IF A SKATEBOARDER IS DOING A POWER-SLIDE, CAUSING FRICTION, UNTIL HE COMES TO A COMPLETE STOP, WHERE WOULD THE FRICTION OCCUR?
ANSWER: BETWEEN HIS WHEELS AND THE GROUND
ANSWER: FRICTION
QUESTION #2 IF A SKATEBOARDER IS DOING A POWER-SLIDE, CAUSING FRICTION, UNTIL HE COMES TO A COMPLETE STOP, WHERE WOULD THE FRICTION OCCUR?
ANSWER: BETWEEN HIS WHEELS AND THE GROUND