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Rosie Dixon
Created on February 29, 2024
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Forces, Pressure and Gravity
go!
Which topic will you choose today?
All the Units
Pressure
From m/s to N/kg
Water and gases
Contact + Non contact
Force diagrams
The difference
Drawing and ratios
Weight or mass?
Relative motion
The difference
The speed in relation
Quiz
Distance time graphs
Showing speed
A quick little quiz
Thank you!
Gravity
Or Gravitational Field Strength
Differences
Weight or Mass
- Weight changes depending on the planet
- Measured in Newtons (N)
- Weight is a force
- Mass stays the same no matter which planet
- Measured in kilograms (kg)
- Mass is how much matter is in you
Matter and weight are very different things! Differences are on the left for you...
‘I don't WANT my dungareeeeees!’
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- Lucy
Gravitational Field Strength
Gravity is not actually a force! GFS stands for Gravitational Field Strength. Gravity depends upon two primary factors: mass and distance. Weight is the name of the force that acts upon an object as a result of gravity
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Next
Question 1 of 5
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Pressure
Click on the eye to view the images!
Gas pressure
Hydraulics
Water pressure
To increase gas pressure, decrease the container's area or increase the temperature or number of particles
Hydraulics exert a larger force than that applied to them. They contain liquid because it can't be compressed.
The water pressure is higher the deeper underwater you go because of the weight of the particles above you.
Relative motion
Relative motion is the speed at which objects sometimes appear to be moving. If your car is travelling at 50mph and it is overtaken by another travelling at 70mph, well it would only look like it was travelling at 20mph from your perspective. If the objects are moving in the same direction, you subtract, but if they are opposite directions, you add!
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Distance-time graphs
Speed = distance / time. Where the line curves up, something is accelerating. Down? Decelerating. If it is a straight line, it is either moving at a constant speed or stationary. In the left example, something travels at a constant speed of 5m/s, stays stationary and then accelerates.
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