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Physics 0625

1. Motion, forces and energy

How objects move, what changes their motion, and how energy is stored, transferred and conserved.

  1. 1.1

    Physical quantities and measurement techniques

    SI units and prefixes, measuring length, volume and time, and the difference between scalars and vectors.

    Full lesson4 questions4 cards
    • 1.1.1Describe how to measure length, volume and time intervals, including the use of multiple readings to improve accuracy.
    • 1.1.2Understand that a scalar quantity has magnitude only and a vector quantity has both magnitude and direction.
    • 1.1.3Determine the resultant of two vectors at right angles, graphically or by calculation.
  2. 1.2

    Motion

    Speed, velocity and acceleration, distance–time and speed–time graphs, and motion under gravity.

    Full lesson5 questions5 cardsSimulationReview first: 1.1
    • 1.2.1Define speed as distance travelled per unit time and calculate it using v = s / t.
    • 1.2.2Define velocity as speed in a given direction, and acceleration as change of velocity per unit time.
    • 1.2.3Interpret distance–time and speed–time graphs, including gradient and area.
    • + 1 more objectives
  3. 1.3

    Mass and weight

    Mass as the quantity of matter, weight as the force of gravity on a mass, and gravitational field strength.

    Full lesson1 questions2 cardsReview first: 1.1
    • 1.3.1Distinguish between mass and weight, and state that weight is a gravitational force.
    • 1.3.2Recall and use W = mg and understand g as gravitational field strength.
  4. 1.4

    Density

    Density as mass per unit volume, measuring it for regular and irregular solids and for liquids, and floating.

    Full lesson3 questions2 cardsReview first: 1.1
    • 1.4.1Define density and recall and use ρ = m / V.
    • 1.4.2Describe how to determine the density of a liquid, a regularly shaped solid and an irregularly shaped solid.
    • 1.4.3Predict whether an object will float based on density data.
  5. 1.5

    Forces

    Resultant force and Newton's laws, friction, springs and Hooke's law, circular motion, turning effect and equilibrium, and centre of gravity.

    Full lesson4 questions4 cardsSimulationReview first: 1.2, 1.3
    • 1.5.1Describe the effects of forces on shape and motion, and determine the resultant of forces acting along the same line.
    • 1.5.2Recall and use F = ma.
    • 1.5.3Describe the extension of a spring and interpret load–extension graphs, including the limit of proportionality.
    • + 2 more objectives
  6. 1.6

    Momentum

    Momentum as mass × velocity, impulse, and conservation of momentum in collisions.

    Full lesson1 questions2 cardsReview first: 1.5
    • 1.6.1Define momentum as p = mv and impulse as Ft = Δ(mv).
    • 1.6.2Apply the principle of conservation of momentum to one-dimensional collisions.
  7. 1.7

    Energy, work and power

    Energy stores and transfers, conservation of energy, kinetic and gravitational potential energy, work, power, efficiency and energy resources.

    Full lesson4 questions4 cardsSimulationReview first: 1.5
    • 1.7.1Identify energy stores and describe transfers between them using the principle of conservation of energy.
    • 1.7.2Recall and use Ek = ½mv² and ΔEp = mgΔh.
    • 1.7.3Recall and use W = Fd and P = E / t.
    • + 2 more objectives
  8. 1.8

    Pressure

    Pressure as force per unit area, pressure in liquids and gases, and the effect of depth.

    Full lesson2 questions2 cardsSimulationReview first: 1.5
    • 1.8.1Define pressure and recall and use p = F / A.
    • 1.8.2Describe how pressure in a liquid varies with depth and density, and recall and use Δp = ρgΔh.