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Physics 8 Online
OpenStudy (anonymous):

Check my answer? Please? Medal. Based on the data given, in what direction will the car accelerate? A. downward B. toward the left C. toward the right D. upward

OpenStudy (anonymous):

A?

OpenStudy (anonymous):

@thomaster @wolfe8 @cwrw238

OpenStudy (doc.brown):

Ok, assume downward. 400N to the right is 0N down 400N to the left is 0N down 400N down is 400N down 450N up is -450N down Add them up 0N+0N+400N-450N = -50N down

OpenStudy (doc.brown):

Which way is negative down?

OpenStudy (anonymous):

IDK

OpenStudy (anonymous):

@doc.brown Why would we add them up? 0_0

OpenStudy (anonymous):

@undeadknight26

OpenStudy (doc.brown):

Here you have four forces acting on a point, each force acting in a different direction. Maybe imagine four ropes tied in the middle, or four rockets on a spaceship.

OpenStudy (doc.brown):

Or four people having a tug of war|dw:1399239899614:dw|

OpenStudy (doc.brown):

If two people pull with the same amount of force, then the rope won't move.

OpenStudy (doc.brown):

|dw:1399240059324:dw|

OpenStudy (doc.brown):

If one person is stronger, or one force is stronger, than the point will move.

OpenStudy (doc.brown):

|dw:1399240244748:dw|

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