force ,velocity, displacement, acceleration, momentum
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what is a force
push or pull on an object caused by it interacted with something
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definition of a contact force
when 2 object have to be touching for a force to act e.g tension in ropes,friction,air resistance
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definition of a non contact
when object dont have to touch for the force to act e.g.. magnetic force ,gravitation force
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newtons 1st
the force is needed to make something start moving speed up or slowdown
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newtons 2nd
f=ma == force =mass x acceleration
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newtons 3rd law
when 2 object interact the forces they exert on each other are equal and opposite
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a van of mass of 2080 kg has an engine that provides a driving force of 5200N.at 70 mph the drag force acting on the van is 5148N. find its acceleration at 70mph.
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