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Physics in the pandemic: reports on how physicists are coping with the effects of the coronavirus.
Edited at 2020-10-08 08:28:44- Mind Map Kingdom
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Physics Knowledge
- Mind Map Kingdom
Mind maps are a great resource to help you study. A mind map can take complex topics like plant kingdom and illustrate them into simple points, as shown above.
- Team Communication Strategies
Mind maps are useful in constructing strategies. They provide the flexibility of being creative, along with the structure of a plan.
- Types of Vitamins
Vitamins and minerals are essential elements of a well-balanced meal plan. They help in ensuring that the body is properly nourished. A mind map can be used to map out the different vitamins a person requires.
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- Outline
Chapter-3-Physics
Resultant Force
A resultant force would cause...
A moving object to...
A stationary object to move
Stop
Increase speed
Decrease speed
Change direction
Deform
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.
F=ma
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
Friction
Bad effects
Creates Heat
Causes wear and tear
Wastes energy
Good effects
Prevents slip
Reducing friction
Moving parts made smooth
Materials with low friction resistance
Use lubricants
Use air cushion
Depends on
Material type
Roughness
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
For example...
A rock on a table
The rock's weight ispushing down on the table
The table's reaction forcepushes it back (3rd law)
Freefall
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