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physics topic - Coggle Diagram
physics topic
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acceleration
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the blue line is less steep than the white line, so the acceleration is slower
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weight and gravity
all objects are affected by gravity. it is a non-contact force that attracts everything in the universe to each other, by a force dependant on the object's mass. the bigger the mass, the stronger the force of gravity and the larger the gravitational field.
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gravity gives the objects it attracts weight. weight is the result of gravity acting upon its pre-existing mass, which remains constant
your mass, for example, would remain the same (assuming no exterior factors have altered it) on mars just like it would on earth
your weight however would change, because the gravitational field strength on mars is different to that of earth
weight can be calculated by multiplying the gravitational field strength with the mass of the object.
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resultant forces
we plot resultant forces on free body diagrams - using force arrows to visualise the forces and directions of those forces acting on an object.
often, forces cancel each other out - the movement remaining is called the resultant force.
calculating the effect of resultant forces is simple in components of 90 degrees, but beyond that, trigonometry and pythagoras must be used.
