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The downforce is needed to counter the lift. This will stick the rear end of the car back to the road and provide better traction and maneuverability. Smart rear wings (they call them wing when they are high and spoiler when they are part of the body design) are designed to provide maximum downforce with minimum drag. This can be done by the correct angle of ...

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TL;DR: I will expand on DKNguyen answer, which provides all the salient points. i.e. (my interpretation) the downforce is desirable to provide a better interface/grip between the car and the ground.) Comparison of drag and lift coefficients for automobiles. The following graph presents a comparison of drag and lift coefficients. figure (source ...

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You do not want to overcome the force of static friction when accelerating because that's when the dynamic friction takes over and your wheels slip. That means that the force applied on the edge of your wheel is limited by the static friction which limits how much effective torque you can apply to accelerate (or maintain speed while overcoming losses due to ...

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In our example, after you overcome the force of friction, the block starts accelerating. This generates inertia force. Inertia force = Mass * acceleration Now, as you increase the force by your hand, the inertia force increases as well. The thing here is to note that you will not experience this force on your hand. This is the reason it is also called as an ...

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When you push on a block, your hand applies a force on that block. An "opposite force" then comes into existence but exists elsewhere. It is not also applied onto the block. It is applied by the block onto your hand. Therefore there is still a net force on the block which causes it to accelerate.

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IMO, Newton's Third Law defines the limiting state of motion. As shown in the illustration below, if $SF_1 = SF_2$, it is in a state of force equilibrium, thus no motion. If one of the reactive shear fraction forces is less than the other, then, the smaller one will slide. It is possible to return to the equilibrium after the smaller one is repositioned (...

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They don't cancel out. Each force if it can move the object it is applying to does work on that object, otherwise it does nothing. your hand force on the table is doing work. the reaction coming from the table is applying resistance to your body through your arms. And your body counter it by the friction of your foot. May be a better example of force and its ...

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