eli5 How can humans push cars and pull massive things with weeks but can’t lift more than a few hundred pounds?

Question

*weels not weeks

In: Physics

Answer 1

Because to lift something up, you need to overcome 100% the force of gravity upwards before it even begins to move. To push or pull a thing on wheels you just need to apply any amount of force greater than the friction of the bearings that the wheels are attached to and it will start moving.