Defining energy, the forms of energy and how they transform, work done = force × displacement, and the use of renewable and non-renewable energy sources, with a Caribbean focus.
5 narrated scenes. Press play, listen and read along — the points appear as they are explained. Use ‹ Prev / Next › or the scene bar to jump to any scene.
Every action, from a kicked football to a lit bulb, is energy changing form. The skill is naming each change and noticing the thermal energy that always appears.
Narration uses your device’s built-in voice. No sound? Switch to “Captions only” — the captions advance on their own.
Copy these into your notebook in your own words — that is how they stick.
Ability to do work; joule (J); scalar.
Kinetic, gravitational PE, elastic PE, chemical, electrical, thermal, sound, light, nuclear, magnetic.
Energy is transformed, never created or destroyed.
Always produced as a by-product of every transformation.
W = F × d; joule; the energy transferred.
Solar, wind, hydro, geothermal, tidal, wave, biomass.
Coal, oil, natural gas (and nuclear fuels).
Sunshine, wind and geothermal opportunities; reduce imported oil.
3 quick games on this lesson. Earn XP and badges as you play — your best score for each game is saved. Games are for practice and do not change your exam readiness. More games in the Physics Arcade.
8 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better. Work each item on paper first.
Write full answers, then reveal the mark scheme and tick the points you earned (16 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [16 marks]
A student lifts a 20 N bag of books onto a shelf 1.5 m high.
(a) (a) Define energy and state its unit. [2]
(b) (b) Calculate the work done in lifting the bag. [3]
(c) (c) State the energy change in the student’s muscles and in the bag as it is lifted. [3]
(d) (d) Name the energy changes in a filament lamp. [2]
(e) (e) Name two renewable energy sources suitable for the Caribbean and give one advantage of each. [4]
(f) (f) State two ways households can save electricity. [2]
Find these in your own past-paper booklets for extra timed practice. Items above are written in the style of these papers; any adapted from a specific question say so.