Several reasons. The main reason being the friction created by the gravitation force acting on the board and pushing the wheels to the ground. Also the air resistance as the board is moving forward. Thirdly, the surface in which the skateboard is riding on would need to be perfectly smooth, theoretically on air, to create no resistance. And finally the rotation of the wheels against the bearings creates friction which even though they are greased to reduce the friction can not completely eliminate this factor.
No, a cube is not aerodynamic. A cube has a flat face, so it will produce more drag. It will also take more energy to push forward because the flat face of the cube is trying to push the wind as you are pushing the cube.
A push pin is a fastener. As a minimum, it fastens a very visible head to a surface. Even used symbolically on e.g. Google maps. Alternately it may fasten one surface (paper) to another.
Becausse ghe gas hass not a lot of pressure so it will push the cubes flat but the syringe isnt strong enogh to keepp them all flat
One method would be with water displacement. Fill a graduated cylinder with a known amount of water. Drop in the nut. Push below surface with wire, or something with negligible volume. Read volume, and subtract.
Pull here push there rule men! :D
the friction between the wheels and the surface of the ground affect the speed of the skateboard. fo instance if you ride the skateboard on a smooth surface (with less friction) the skateboard will go faster.
Only if you push it. On a perfectly flat surface, in neutral it will not roll without assistance.
Kick, Push
friction
60 people with anthropedimetric alkorotovetics can do it.
A fault causes a crack due to one tectonic plate overlapping another like if you place 2 piles of books on a flat surface and push them together., A fold is like a bend, like if you place 2 towels on a flat surface and push them together.
a thumb tack has a flat circle top while a push pin has the tower like top.
Yes. Otherwise, the slightest push would make the object move around.
40 newtons
that is regular
This is a mighty vague question, but I'll give it a shoot. A skateboard has wheels - when these wheels are acted upon by a force (such as you pushing it), they proceed to take the energy from that force and change it into centrifugal and centripetal forces- this causes the wheels on your skateboard to turn. Your skateboard won't roll indefinitely from 1 push because while your skateboard is rolling it is creating friction with the sidewalk you're skateboarding on. Friction is caused when 2 objects rub up against each other - this creates heat and a transfer of kinetic energy. Once all the kinetic energy has been transferred from your skateboard's wheels to the sidewalk, your skateboard come to a stop.
There are several forces involved while riding a skateboard. The force of friction (air resistance and contact with ground) acting against the motion and the pushing force from when you push off with your foot acting with motion. There are also several normal reaction forces, the weight of the person on the skateboard and the weight of the skateboard on the ground.