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Mechanics Question Help
15
Hey guys, how do I know the friction force is acting upwards? Is it because the crate is trying to move down? Initially I thought the friction force opposed force F. Thanks guys
(edited 2 years ago)
Reply 1
Nithu05
OP
15
Original post by Driving_Mad
Friction always opposes the direction of motion.
Ok thanks. So this is the case regardless of force F?
Reply 2
Nithu05
OP
15
Original post by Driving_Mad
Friction always opposes the direction of motion. The crate is held at rest by a force acting upwards meaning it’s on the point of moving down.
Thanks so much! That has cleared everything up.
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