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Mechanics, Blue: Formula used for Linear Motion [Topic 2], Red: Formula…
Mechanics
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Displacement
the change in position of an object
the angle through which a point or line has been rotated in a specified sense about a specified axis
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Work
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Work done by spring force , W=1/2kx^2 where F=-ks
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Energy
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Potential Energy
Gravitational
Elastic
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Force
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Newton's 1st law
If there is no net force on an object, the object will stay at its motion
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Projectile Motion
Collision
Inelastic
- An inelastic collision is a collision in which there is a loss of kinetic energy. While momentum of the system is conserved in an inelastic collision, kinetic energy is not. This is because some kinetic energy had been transferred to something else.
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Explosion
- An object being fired from a cannon is also a collision where momentum must be conserved. As the momentum before the 'collision' is zero, the momentum after the collision is zero.
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Elastic
- An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions.
- collisions where the energy lost are negligible and considered elastic, even though they are not perfectly elastic
- Newton's cradle
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Center of Gravity
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Newton's Law of Gravity
A uniform solid sphere exerts a gravitational force outside the sphere with a 1/r2 depends as if a ll the matter in the sphere were concentrated at its center.
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Elasticity
Young's modulus
Hooke's law
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Application Newton's Law
Friction
Kinetic friction
Static friction
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Rotational Motion
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Torque
τ = R┴ F
From F = ma >
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Rotational Inertia
I = ΣmiRi²
The larger the diameter of cylinder, the greater the rotational inertia although it has the same mass
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