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Physics in the pandemic: reports on how physicists are coping with the effects of the coronavirus.
A resultant force would cause...
A moving object to...
A stationary object to move
It can be calculated by addition or subtraction for parallel forces.
Newton's 3rd Law
For every action there is anequal and opposite reaction
Action and reaction act on different objects
Newton's 2nd Law
The resultant forces acting upon an object isequal to the product of the mass and theacceleration of the object.
SI unit for force: newton (N)
1N = 1kg m s^2
The direction of the force is the same as theobject's acceleration
The direction of the free body is dependent onthe resultant force
Causes wear and tear
Moving parts made smooth
Materials with low friction resistance
Use air cushion
is proportional to the force pressing surfacestogether
1kg = 10N
Newton's 1st Law
1) An object at rest would remain at rest
2) An object in motion will continue to be inmotion at a constant speed in a straight line
3) In the absence of a resultingforce acting on it
In this law, the forces are balanced
A rock on a table
The rock's weight ispushing down on the table
The table's reaction forcepushes it back (3rd law)
A falling object would reach a point where
Air resistance = Weight
This is called terminal velocity
Resultant Force = 0N
No resultant force ≠ No force
All force are balanced