If the crate (drawn inside!) is moving at a constant speed in a straight line and the force applied is 310 N, what is the magnitude of the force of friction?

620 N, 155 N, 0 N, or 310 N ?

***not sure how to go about this:( thanks!!

Question

If the crate (drawn inside!) is moving at a constant speed in a straight line and the force applied is 310 N, what is the magnitude of the force of friction?

620 N, 155 N, 0 N, or 310 N ?

***not sure how to go about this:( thanks!!

anonymous · Answer

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jim_thompson5910 · Answer

"constant speed" means the acceleration is 0

jim_thompson5910 · Answer

if the acceleration were not zero, then the speed would change at some point in time

anonymous · Answer

ohh okay, so it would be 0 N ?

jim_thompson5910 · Answer

no

anonymous · Answer

ohh oops it's asking for magnitude! so it would be 310 N ?

jim_thompson5910 · Answer

"the force applied is 310 N"

so you're pulling on the crate with a force of 310 N

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