Speed tells you how quickly distance is covered. Velocity adds the critical missing word: the direction. They share one simple equation, but the difference between a scalar and a vector runs right through the rest of mechanics.
Speed is the distance travelled per unit time, a scalar. Velocity is speed in a stated direction, a vector. Both come from v = s / t, measured in metres per second (m/s).
Set a constant speed and release the trolley. Watch how distance continuously grows while the object is moving, then see how displacement handles the return trip differently from distance.
Four quick checks on speed, velocity, and the distance-displacement split. Each correct answer earns XP and lights this skill on your star map.
As the trolley keeps moving forward, the distance it has travelled...
When the trolley returns exactly to its starting point, its displacement is...
Velocity is a vector while speed is a scalar because velocity also states...
The equation linking speed v, distance s and time t is...
Two cars travelling at the same speed in opposite directions have different velocities, because velocity includes direction. When a question gives a direction, or asks about a change in direction, it is testing velocity, and the sign or compass bearing is a required part of your answer.
A cyclist travels 1.5 km in 5.0 minutes at a steady rate. Calculate the average speed in m/s.
Unlocks once the four checks above are done. Worth more XP, written in the style of Paper 1.
A cyclist travels 1500 m in 300 s at a steady rate. The average speed is...
Two cars travel at 30 m/s in opposite directions. They have...
A car drives 4 km north, then 4 km back south, taking 0.5 h in total. Its average velocity is...
This skill is now lit gold on your star map. Keep the chain going.