Distance, displacement, speed, velocity and acceleration; a = (v − u) ÷ t; reading distance–time and velocity–time graphs; and finding acceleration and distance travelled from a velocity–time graph.
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.
A speedometer shows speed. A velocity–time graph shows everything: how fast, how quickly it changed, and how far the car went.
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.
Distance: scalar path length. Displacement: vector, straight line start → finish.
speed = distance ÷ time; velocity = displacement ÷ time.
a = (v − u) ÷ t; m/s²; negative = deceleration.
Gradient = speed; horizontal = stationary.
Gradient = acceleration; area = distance.
Triangle ½bh; rectangle bh; trapezium ½(a + b)h.
Total distance ÷ total time (not the mean of speeds).
g ≈ 10 m/s²: speed rises by 10 m/s each second.
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]
The graph shows a car’s velocity v against time t. It rises uniformly from 0 to 20 m/s in 8 s, stays constant for 10 s, then falls uniformly to rest in 5 s. A calculator may be used.
(a) (a) Calculate the acceleration during the first 8 s. [3]
(b) (b) Describe the motion between t = 8 s and t = 18 s. [1]
(c) (c) Calculate the deceleration in the last 5 s. [3]
(d) (d) Calculate the total distance travelled. [4]
(e) (e) Calculate the average speed for the whole journey. [3]
(f) (f) Distinguish between distance and displacement. [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.