You might have expected the result to be pressure, but it's not.
Pressure occurs due to the bombardment of air molecules on a surface. The weight of a column of air causes so little pressure that it can be considered negligible.
The main forces acting on the pram will be the force the person pushing the pram exerts on it, the friction against the ground and air resistance. When the pram is speeding up the force the pusher exerts will be larger than the combined force of the air resistance and the friction against the ground. When the pram is moving at a constant speed the forces acting on it will be balanced I.e. pushing force= air resistance+friction. When the pram is slowing down the air resistance and the friction will be greater than the pushing force.
atmosphere
This force is called atmospheric pressure, the force is measured per unit area because the bigger the area the more molecules hit. It is 14.7 pounds per square inch ("psi")
Gravity pulls "down" and the opposite force is provided by whatever is beneath the object.
Friction and Air Resistance
atmospheric pressure
The pushing force of air is called air pressure.:)
The force pushing a parachute up is called drag. It is created when the parachute interacts with the air as it falls, slowing down its descent.
A force that is the result of the weight of a column of air pushing down on an area, that is air pressure.
The air is always pushing down on you, just slightly more under high pressure. You don't notice it because we've evolved to counter this downward force with an outward force of our own.
The force of air pushing down on us is due to atmospheric pressure. At sea level, this pressure is about 14.7 pounds per square inch (psi). This pressure decreases with increasing altitude.
The force that air exerts on the surface of the Earth is called atmospheric pressure. It is caused by the weight of the air above pushing down on the surface.
Air pressure.
A good example of air resistance is when a skydiver jumps out of a plane and feels the force of the air pushing against their body as they fall. This force slows down their descent and creates drag.
Air Pressure
The object floats
The weight of the air pushing down on Earth's surface is due to air pressure, which averages around 14.7 pounds per square inch (psi) at sea level. This pressure is caused by the force exerted by the weight of the air molecules in the atmosphere above.