Tractor on an incline

owenhigdon

The problem states that a 3900kg trailer is pulled by a tractor up a 16 degree incline with a steady speed of 3.0m\s.

I am asked what force the tractor exerts on the trailer.

I said that the force was equal to the (W)(sin)16degrees, i get the right answer in the back of the book but i think its a coincidence....any help on this one would be much appreciated

cimon9999

me again! Your answer is right. Because you're not accelerating the trailer up the incline, there is no additional force required. All you need to do to maintain the speed of 3ms-1 is to overcome the backward force down the slope.

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owenhigdon	Tractor on an incline Tweet The problem states that a 3900kg trailer is pulled by a tractor up a 16 degree incline with a steady speed of 3.0m\s. I am asked what force the tractor exerts on the trailer. I said that the force was equal to the (W)(sin)16degrees, i get the right answer in the back of the book but i think its a coincidence....any help on this one would be much appreciated

cimon9999	me again! Your answer is right. Because you're not accelerating the trailer up the incline, there is no additional force required. All you need to do to maintain the speed of 3ms-1 is to overcome the backward force down the slope.