0
A force is an application of energy that tries to make something change its motion. A good example of this is when you put a ball on a level floor and give it a push. The push applies a force to the ball, which then changes from not moving to rolling across the floor. To stop the ball, you would apply a force in the opposite direction and make it come to rest.
Sometimes a force doesn't make something move because it's exactly matched by an opposite force. When you sit on a chair, your weight is a force acting on the chair: the chair pushes back just as hard onto you, so you don't fall through the chair. The two forces (your weight and the chair's pushing back) balance out.The units of force are pounds (in the US) or Newtons (in the Metric system)
Pressure is a force spread out over an area that it acts upon. For example, lets say I was walking along and I stepped onto a one-inch square piece of brick on the sidewalk. I weigh around 175 pounds, so my body would apply a 175 pound force to that piece of brick. The sidewalk would also feel that force transmitted through the piece of brick, spread out over the one square inch of surface the brick has in contact with the sidewalk. The pressure is the force divided by the area it acts on (P = Force/Area), so in this case the pressure applied to the sidewalk is 175 pounds per square inch. If that piece of brick were 5 inches square, its area would be 25 square inches: the pressure applied to the sidewalk would be 175 pounds/25 square inches = 7 pounds per square inch. The same force is acting on the sidewalk: it's just spread out over more brick surface. Pressures can have units of pounds per square inch, or Newtons per square meter (called Pascals).
Liquids also have pressure which depend on their weight, how closely packed their molecules are, and their temperature. This pressure is caused by the molecules of the liquid bouncing agains a surface they're in contact with - like the inside of a jar, or the inner surface of an eye. If a liquid has a pressure of one pound per square inch, every square inch of surface it presses against has one pound of force spread over it.
The total amount of force the pressure exerts on the surface is found by multiplying the pressure by the area of the surface it is pushing on (F = Pressure x Area). The one pound per square inch from before pushing on ten square inches of surface adds up to a total force of ten pounds trying to push whatever the surface is attached to.
So, a force is essentially a push, and pressure is a push spread out over a surface.
Add your answer:
Earn +20 pts
What is the difference in pressure between two different locations called?
If you mean locations as in physical location on the earth... Then, differences in pressure between locations can be attributed to their altitudes (or heights) from sea level.
A number of differences between two regions can result in?
A number of differences between two regions can result in sectionalism.
What is the differences between one half and two third?
1/6
Name two major differences between an equation and an expression?
equation
What are two differences between fractions and ratios?
a fraction is an amount of something and a ratio is how much of something there is.
What are the two differences between force and pressure?
a force is a push or pull and pressure is a a push
The pressure gradient force causes air to flow from areas of relatively pressure to areas of relatively pressure?
The pressure gradient force is responsible for initiating horizontal air movement from high pressure to low pressure areas. This force is a result of pressure differences between two adjacent regions, leading to the flow of air in an attempt to equalize the pressure.
What happens when the differences in air pressure between two masses increase?
When two masses that have a difference in air pressure meets they will create a storm front. When the differences in air pressure between the two masses increase the severity of the storm created will intensify.
What is the direction of the net force between two pressure systems?
The direction of the net force between two pressure systems depends on their relative magnitudes and locations. If one system has higher pressure than the other, the net force usually points from higher pressure to lower pressure, resulting in air flow or wind.
Which three forces influence wind?
Pressure gradient force: differences in air pressure between two areas create a force that causes air to move from high pressure to low pressure. Coriolis force: the rotation of the Earth causes moving air to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Frictional force: the interaction of air with the Earth's surface can slow down the movement of wind, particularly near the ground.
What were the two factors that caused differences in wind speed?
The two main factors that cause differences in wind speed are the pressure gradient and the Earth's rotation. The pressure gradient is the difference in air pressure between two points, which drives the movement of air. The Earth's rotation also influences wind speed through the Coriolis effect, which deflects air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, creating wind patterns.
How can pressure differences in Earth's atmosphere contribute to winds?
Pressure differences in Earth's atmosphere create areas of high and low pressure. Air flows from high pressure to low pressure, creating wind. The greater the pressure difference between two areas, the stronger the resulting winds will be.
Winds start to blow when the air temperature?
Winds start to blow when there are differences in air pressure between two regions. These pressure differences cause air to move from areas of higher pressure to areas of lower pressure, creating wind. Temperature can play a role in creating these pressure differences, but it is not the sole factor in wind formation.
What is the difference in pressure between two different locations called?
If you mean locations as in physical location on the earth... Then, differences in pressure between locations can be attributed to their altitudes (or heights) from sea level.
Differences in temperature between two air masses causes?
Differences in temperature between two air masses cause variations in air pressure, which leads to the movement of air from high-pressure areas to low-pressure areas. This movement generates winds, which can result in the formation of weather systems such as storms or changes in atmospheric conditions.
What two factors does pressure depend on?
The two factors pressure depends on is force and area.
How would you distinguish force and pressure?
One way to distinguish between the two is that force is a vector quantity that has both magnitude and direction. Pressure is omni-directional and acts on all directions equally.
