Dan and Karen are riding on a carousel at a fairground. They are moving at a constant speed. Why are they accelerating?
Things you may want to include:
1. Difference between a scalar and a vector
2. Difference between speed and velocity
3. Is acceleration a vector or a scalar?
4. What does that word 'constant' mean when referring to speed?
5. If speed is constant, what else is changing?
6. Finally, given all this, can you summarise you answer to the question?