- #1
al_201314
- 116
- 0
Hi everyone,
I need some elightenment on one of the aspects of Newton's 3rd law. It's not a homework question but I'd like to gain some understanding of this concept.
Let's say, a car accelerates from rest on a road. The tires pushes against the road (action force) and the road pushes back on the wheels (reaction force). I can't really seem to grasp this.
Say the wheel exerts 5N of the road, while the road exerts 5N on the wheel. Wouldn't the forces cancel out? If the wheels produce a more force as the accelerator is being stepped on, wouldn't the reaction forces cancel out as well resulting in 0 acceleration?
My thoughts are that when the wheel exerts force on the ground, the Earth exerts force on the wheel. And the Earth accelerates as well, but it's not noticeable because of the huge mass of the Earth but the car has a much lower mass resulting in a noticeable acceleration. Is this right? Haven't been able to convince myself on this as I'm still a blurred by the cancelling out of the forces.
How do you determine what is the maximum friction a surface could produce?
Sorry for the long post, thanks a lot :)
I need some elightenment on one of the aspects of Newton's 3rd law. It's not a homework question but I'd like to gain some understanding of this concept.
Let's say, a car accelerates from rest on a road. The tires pushes against the road (action force) and the road pushes back on the wheels (reaction force). I can't really seem to grasp this.
Say the wheel exerts 5N of the road, while the road exerts 5N on the wheel. Wouldn't the forces cancel out? If the wheels produce a more force as the accelerator is being stepped on, wouldn't the reaction forces cancel out as well resulting in 0 acceleration?
My thoughts are that when the wheel exerts force on the ground, the Earth exerts force on the wheel. And the Earth accelerates as well, but it's not noticeable because of the huge mass of the Earth but the car has a much lower mass resulting in a noticeable acceleration. Is this right? Haven't been able to convince myself on this as I'm still a blurred by the cancelling out of the forces.
How do you determine what is the maximum friction a surface could produce?
Sorry for the long post, thanks a lot :)