If an object is moving to the left with 50 mph then how can the friction force and the force horizontal component force be eQUAL. Because if they were equal wouldn't that make the object stationary

Question

anonymous · Answer

If an object is moving to the left, so 	friction force acts to the right

F - Ffriction = m a

If F = F friction; so

F - Ffriction = 0 

the object stationary

anonymous · Answer

No, wait, that just means it has no aceleration, it does not mean it is stationary.
If the forces are equal it can still move.

anonymous · Answer

Yeah imagine being in a car at 50mph, if your coasting the friction will slow the car to a halt, the engine has to do some work to keep the car at a constant speed.

anonymous · Answer

Yes of course, but I forgot to say that I saw in a different frame of reference, where I has the object

anonymous · Answer

"If an object is moving to the left" So were not moving with the object. Though if we were then sure the object is stationary to us.