C8 : Linear Momentum

8.2 : Conservation
of Momentum

8.4 : Conservation of Energy
& Momentum in Collisions

8.3 : Collisions & Impulse

8.10 : Systems of variable mass;
rocket propulsion

8.8 : Center of Mass
DETAILS YT

8.5 : Elastic collisions
in one dimensions

8.6 : Inelastic Collisions

8.7 : Collisions in 2& 3 Dimensions

8.1 : Momentum & Its Relation to Force

8.9 : CM & Translational Motion

Momentum is a vector symbolized by symbol p and is defined as p=mv

direction same with velocity

Force is a measure of velocity of the change
of momentum over time

images 7961569

Total momentum does not changed
only change in direction
LAW
The total momentum of an isolated system remains constant When the net external force objects is zero, total momentum remains constant*

Impulse - The product of force and the time download (1) images (1)

Momentum is conserved in all collisions
Collisions in which KE is conserved called ELASTIC , &
those in which it is called INELASTIC

The total KE of the system is the same b4 & after
More Equation

Collision elacol2

Sum P(initial) = Sum P(final)
Sum K(initial) = Sum K(final)

Sum of KE is lost thermal or potential energy
Complete inelastic collisions which objects stick together afterward

Sum K(initial) = Sum K(final) + losses energy

unnamed

images

STEP TO SOLVE

  • Make sure write the full equation if elastic or inelastic
  • Resolve in X-axis & Y-axis
  • Simplify and solve y-axis
  • Check units and magnitudes of result

CM will closer to the larger mass

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The total momentum of a system of particles
is equal the product of total mass & velocity of CM

The total force is equal to total mass multiplied by acceleration of CM
Ma_cm = Sum F_ext

ROHANIE BINTI ISHAK
A20SC0346

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