Class 1:

• Units and Dimensions

  • SI base unit and Derived SI units

• Kinematics

  • Distance vs displacement

    • distance is the length of a path(total) and it is scalar d

    • displacement is the change in path and is a vector quantity d

  • Speed and velocity

    • Speed is how fast something is going v = d/t and is scalar (m/s)

    • Velocity is speed and direction - average velocity = s/t

  • Average acceleration - the rate of change of velocity - a = v/t

  • Tail-to-tip method of vectors

    

  • The big 5 equations:

    • identify known quantities, then the desired quantity, choose the equation with the missing variable you don’t have and solve

    • Sometimes gravity can be used in place of acceleration → g = 10 m/s²

  • Using a graph, you can find three quantities → value at a point, slope, area under the curve

    • For a velocity vs. time graph → slope gives acceleration and area under gives the displacement

• Mass: measure of an object’s resistance to acceleration(inertia) = kg scalar

• Force

  • Net force = sum of all applied forces on the object → vector addition

  • Fnet = ma → mass x acceleration

    • Components of Fnet can be separated in y and x

  • Different forces can be = tension, gravity, normal

  • Know SOH CAH TOA

  • Know your 30-60-90 triangle and 45-45-90 triangle

    • √2 = 1.4 (valentines day)

    • √3 = 1.7 (St. Patrick’s day)

• Newton’s Laws

  • 1st - Inertia: an object in motion stays in motion at a constant velocity, and an object at rest tends to stay at rest

    • Fnet = 0 → v is constant

  • 2nd - the acceleration of an object is directly related to its Fnet and inversely related to its mass → F = ma - only one object

  • 3rd - for every action, there is an equally opposite reaction

    • if forces are equal, they will cancel out - requires 2 objects

• Friction force: the force between two slid surfaces that resists slipping motion between them

  • Kinetic = direction opposes velocity → skidding/slipping

  • Static friction = direction opposes other forces → No motion relative to the contact surface or rolling without slipping

Class 2 - 22/06/2024:

• Uniform circular motion

• Torque

• Work and Energy