anonymous
  • anonymous
PROJECTILE MOTION-Why isn't there any accelertion in the x direction while there is an acceleration of -g in the y direction?
MIT 8.01 Physics I Classical Mechanics, Fall 1999
katieb
  • katieb
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anonymous
  • anonymous
because the acceleration due to gravity force has no x-axis component. although the projectile is moving on x-axis, the weight is always the same
anonymous
  • anonymous
oh! so that means the acc. due to gravity (g) has only y component that is it acts downwards only and not horizontally therefore the acceleration due to gravity for the x component is zero.
anonymous
  • anonymous
exactly

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anonymous
  • anonymous
thanks buddy!! are you an mit student?
anonymous
  • anonymous
You can have an acceleration in the "x" however it is not due to gravity. Air friction will provide the force that slows the projectile down horizontally however this effect is often neglected as it makes a mess of the nice negative quadratic.
anonymous
  • anonymous
remember accceleration is the rate at which velocity changes,so if an object moves in the x direction with certain V over time t,then there is acceleration in that direction

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