how do you find distance travelled in a distance time graph
it is the area under the graph
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what is newtons first law
that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
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what is newtons second law
when an unbalanced force acts on an object: the direction of the object's acceleration is the same as the direction of the unbalanced force
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what is acceleration in proportion to
the resultant force
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what is newtons third law
when to objects interact, they exert equal and opposite forces on each other
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force=
mass x acceleration
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why is mass and weight not the same thing
because weight include the gravitational pull and mass is how much stuff is in something
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weight=
mass x gravitational field strength
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momentum =
mass x velocity
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what is the momentum of a stationary object
0m/s
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why does a force cause a change in momentum
because a force could act of the object changing the mass or velocity
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how do you measure reaction time
ruler drop test
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stopping distance=
thinking distance + braking distance
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what are the factors that affect your stopping distance
speed, reaction time, mass and how effective the brakes are
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why are large decelerations dangerous
because they can cause serious injuries eg: car crashes
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