Motion and pressure Flashcards
What is speed and what is it measured in?
Speed is how far something moves in a certain time. It is measure in m/s.
What is relative motion?
Compares how fast an object is moving to another.
How does gas pressure occur?
Collisions between gas molecules and the containers produce gas pressure. If you compress a gas into a smaller volume, there will be more collisions and so a higher pressure.
How do you calculate the average speed from a distance time graph?
To calculate the average speed from a distance, time graph, you find the distance covered and divide it by the time taken.
What happens when you heat a gas? What does the gas particles do and how does the pressure change?
When you heat a gas particles will have more energy they move more quickly and collide with the container more often, so the pressure will increase.
What is atmospheric pressure?
Atmospheric pressure is the pressure acting loss from the air around us, the high above sea level, the lower the atmosphere of pressure. This is because there is less dense the higher you go up from sealevel so that fewer collisions between air particles.
What are moments? What is the unit for moment?
Moments of the turning affect of a force, the unit for the moment is newton meters, Nm.
How do you calculate moments?
To calculate the moment you multiply the force applied by the distance from the pivot.
Define equilibrium.
During equilibrium, all the clockwise moment added together, must equal all the anticlockwise moments added together. This means they are equal.
What is pressure?
Pressure is the force exerted on a surface because of weight and is measured in newtons per metre. Squared.
How do you calculate pressure?
To calculate pressure you divide the force by the area equal pressure in Newton metres squared.
What force is the reason object float?
Upthrust. Liquid pressure produces this up for us. In example, the object float because it up for us acting on the bottom of it is stronger than the forces acting on top.
What What do solids and liquids do in terms of pressure under exertion?
solids and liquids incompressible because all the particles are already touching. This means they pass pressure on.
we use arrows to show the direction of gases what’s the big arrow showing what does small arrow show?
Big arrow shows the amount of force and have a bounce around the same with little arrows, but with less force.
